---
title: "620×620 LED Panel Lights for Odenwald Ceilings (vs 60×60)"
url: "https://www.olamled.com/led-panel-620x620-odenwald-ceiling/"
date: "2026-09-02T13:26:23+00:00"
modified: "2026-09-11T05:51:59+00:00"
---

A **620×620 LED panel** is a recessed commercial ceiling luminaire whose housing measures 620 × 620 mm, cut for the **625 mm module** of German and Austrian system ceilings (Odenwalddecke, Rasterdecke). A catalog “60×60” panel is a different product: a **595 × 595 mm** housing for the **600 mm** international T-bar module. The two cuts are 25 mm apart, and they are not interchangeable.

The working answer: **German and Austrian system ceilings on a 625 mm module take a 620×620 mm panel.** Professional catalogs also write **625×625 mm** for the same grid; that is the *module*, not the metal. International and UK T-bar takes a 600 mm module, and the luminaire is usually **~595×595 mm**. Measure the opening, not the brochure. A 595×595 panel drops into a 600 mm grid and **rattles or gaps** in a 625 mm Odenwald grid. That is a size failure, not a glare failure.

![Square 620x620 LED panel flush in a German metal cassette Rasterdecke grid with a measuring tape on the T-bar](https://www.olamled.com/wp-content/uploads/cover-620x620-odenwald-led-panel-1200x630-1.webp "620×620 LED Panel for Odenwald Ceilings vs 60×60")625 mm is the ceiling module; 620 mm is the luminaire. A 595 mm panel rattles in a 625 mm grid.Written by the OLAMLED engineering team. OLAMLED is a Shenzhen custom commercial LED OEM/ODM factory (17 years in commercial LED) supplying brand owners, distributors and project specifiers in Germany and the EU. This page covers **ceiling commercial LED panel lights** only, meaning recessed, surface or pendant Rasterleuchte replacements, not video, photo or therapy panels.

If you also need UGR, 4000 K and DALI-2 for a German office, start with the pillar: [LED Panel Light Buying Guide for Germany: Size, UGR & Commercial Specs](https://www.olamled.com/led-panel-light-buying-guide-for-germany-size-ugr-commercial-specs/). This article is the cluster node that goes deeper on **one decision: 620×620 mm versus 595×595 mm**. So why do German ceilings and international catalogs quote two different numbers for what looks like the same square?

## Why German ceilings say 62×62 while catalogs say 60×60

German ceilings say 62×62 because the German and Austrian system-ceiling module is **625 mm** and the luminaire cut for that module is **620 mm**. Catalogs say 60×60 because the international T-bar module is **600 mm** and its luminaire is **~595 mm**. Two ceiling modules live side by side in European commercial work: the 600 mm module (UK, much of the rest of Europe, and a large share of Chinese OEM catalogs) and the 625 mm module, the grid people still call **Odenwald** or **Rasterdecke**.

![Side-by-side German ceiling: a 620 mm LED panel flush in a 625 mm grid versus a 595 mm panel showing gaps](https://www.olamled.com/wp-content/uploads/h2-why-62x62-vs-60x60-1.webp "62×62 vs 60×60 Catalog Label Explainer")60×60 is a 600 mm module (~595 mm metal). 62×62 / 620 is the German cut. 625 is the grid.Those two numbers are not “almost 60×60.” They are **25 mm of grid** and about **25 mm of panel**. That is a visible gap on every side if you drop the wrong SKU.

Catalogs mix three labels for the same German product:

| What the document says | What it usually means | Who writes it |
|---|---|---|
| 60×60 / 600×600 | 600 mm **ceiling module**; luminaire often **595×595 mm** | International OEM lists, UK T-bar, T8 grille replacement |
| 62×62 cm / 620×620 mm | **Actual panel cut** for a 625 mm German/Austrian grid | DE distributors, OEM size tables |
| 625×625 mm / 62.5×62.5 | **Ceiling system grid**, not the metal of the luminaire | Professional brand families (e.g. LEDVANCE PANEL COMPACT 625) |

A professional 625-family datasheet (manufacturer guidance, LEDVANCE PL COMP 625 V 26W 840 hosted as a public PDF) prints **Length 620.00 × Width 620.00 mm** for a **625 × 625 mm** grid, “suitable for recessed ceiling systems with grid size of 625 × 625 mm,” with recessed / suspended / surface kits as **separate accessories**. That split, **625 on the ceiling and 620 on the luminaire**, is the German office SKU. Source: [PL COMP 625 V 26W 840 datasheet (PDF)](https://staticde.multi-lite.de/shop-b2b-400/46524_data-sheet-EN.pdf).

On German RFQs the centimeter shorthand is the same cut: **62 × 62 cm** means **620 × 620 mm**, ordered for **Odenwalddecke / Rasterdecke**. Measure the opening anyway; a catalog centimeter is not a site tape.

The ceiling manufacturer itself works in the same millimeter band. [OWA – Odenwald Faserplattenwerk’s Standard LED](https://www.owa.de/en/produkt/standard-led-standled-en/) (ceiling-system manufacturer guidance) lists a **nominal** cassette of **625 × 625 × 75 mm** and a manufactured luminaire of **622 × 622 mm**, compatible with several OWAconstruct systems. A 625 module does not mean a 625 mm box of aluminum.

German mineral-tile systems grew up on a **625 mm** planning grid; international T-bar grew up on **600 mm**. Factories that only tool 595×595 for “60×60 worldwide” meet that gap on the first German RFQ. The only reliable way to know which module you have is to measure it.

## Measure the opening, not the brochure tile

Order the panel cut from the **clear opening** between the T-bars, measured on site in millimeters (or taken from the ceiling-system drawing). Do not order from the tile printed on the carton or from “60×60” in a Chinese catalog.

![Yellow measuring tape on a German metal cassette ceiling next to a flush square LED panel opening](https://www.olamled.com/wp-content/uploads/h2-measure-the-opening.webp "Measure the LED Panel Opening, Not the Brochure")Order from the clear opening between T-bars. Photograph the tape in the bay.### How to measure in five minutes

Measuring a Rasterdecke opening takes five steps: identify the ceiling type, tape the inside of the grid, read the module class from the opening, check the void depth, and photograph the tape in the bay.

1. **Identify the ceiling.** Visible T-bar (lay-in Rasterdecke) versus concealed clip-in versus plasterboard versus raw concrete. Only the first two are grid drop-in.
2. **Measure the opening, not the tile.** Tape the **inside** of the grid, both directions, in millimeters. Do not include the flange of the bar. Measure two bays if the building has been altered.
3. **Read the module from the opening.** A clear opening around **605–615 mm** is a 600 mm module (order **595×595**). A clear opening around **630–640 mm** is a 625 mm module (order **620×620**). Exact numbers vary with bar width; the 25 mm class difference is obvious on a tape.
4. **Check the void.** Driver and springs need depth. LEDVANCE’s 625 datasheet lists a **50 mm** mounting depth for that family. Treat every brand’s void as a datasheet number, not a guess.
5. **Photograph the grid with the tape in the shot.** On OEM RFQs this single photo prevents a container of the wrong cut.

![Close-up of a measuring tape on a German metal cassette ceiling bay beside a square LED panel](https://www.olamled.com/wp-content/uploads/h3-how-to-measure.webp "Five-Minute Rasterdecke Opening Measurement")~605–615 mm opening → 595×595. ~630–640 mm → 620×620.From factory RFQs: the most expensive “small” error is a distributor who ordered **600×600** because the project schedule said “Rasterleuchte 60×60,” then found an **Odenwald 625** on site. The panels arrive. They sit in the grid like a tray on a table that is 25 mm too wide. They rattle in the HVAC return, they show a dark gap on four sides, and the contractor calls it a quality complaint. It is a **size** complaint.

If you cannot get on site, ask the ceiling contractor for the **system name** and the **nominal module in millimeters**. Do not translate “62,5er Raster” into 600.

## 620×620 / 625×625 vs 595×595: decision table

The decision is mechanical: a measured opening of about 610 mm takes a **595×595 mm** panel, a measured opening of about 635 mm takes a **620×620 mm** panel, and a building with both grids needs **two SKUs**. The table maps what you measured or what the drawing says to the cut you should order.

![Odenwald metal cassette panel bay beside an international T-bar lay-in ceiling module](https://www.olamled.com/wp-content/uploads/h2-decision-table-620-vs-595.webp "620 vs 595 LED Panel Cut Decision Table")~610 mm opening → 595. ~635 mm opening → 620. Mixed buildings are two SKUs.| You measured / you know | Ceiling | Order this cut | Do not order | Notes |
|---|---|---|---|---|
| Opening ~605–615 mm, or “600 mm T-bar / 60×60 grid” | International T-bar; many T8 grille replacements | **595×595 mm** (catalog 600×600) | 620×620 | The 5 mm is play so the chassis sits on the T-bar. Same logic as [Luxifer’s 600×600 note](https://www.luxifer.de/quadratische-led-panele-600x600mm/) (manufacturer guidance): 600 is the raster, 595 is the luminaire. |
| Opening ~630–640 mm, or “625 mm / 62,5er / Odenwald / Rasterdecke” | German/Austrian system ceiling | **620×620 mm** (catalog 62×62 or 625×625) | 595×595 | A 595 mm / 60×60 panel in a 625 mm grid **leaves visible gaps** and rattles. |
| Drawing says 625×625, datasheet says 620×620 | Same German grid | **620×620 mm** | A literal 625 mm chassis | LEDVANCE 625 family: grid 625, housing 620. |
| Existing 600×600 T8 grille / CAT2 cell | 600 mm T-bar | **595×595 mm** | 620×620 | OLAMLED PA 595×595 is the T8-grille drop-in. |
| Mixed floor: some 600, some 625 | Two systems in one building | **Two SKUs** | One “universal 60×60” | Hold both cuts or survey bay by bay. |
| Plasterboard, concrete, no grid | Not a Rasterdecke | Surface frame or plaster kit; **size still 595 or 620 to match the visual module** | A grid drop-in with no T-bar | See the mounting section below. |

Luxifer (KLUS, manufacturer guidance) is explicit on the German side: **a 595 mm panel does not sit flush in a 625 mm Rasterdecke; you need 620×620 mm or an insert frame.** That insert frame is a rescue SKU, not a specification strategy. Specify the right cut.

Side door, not a size topic: once the panel *fits*, glare is an optic and a room calculation. A rattling 595 in a 625 grid is not a UGR problem. For UGR ≤19 versus UGR <16 in EN 12464-1 offices, see the UGR section of the [German LED panel buying guide](https://www.olamled.com/led-panel-light-buying-guide-for-germany-size-ugr-commercial-specs/).

## Odenwald / Rasterdecke vs international T-bar: what actually fits

**Rasterdecke** in German usage is a suspended modular ceiling: metal grid, infill tiles, luminaires laid into the same module. **Odenwalddecke** is the everyday name for the mineral-tile systems associated with OWA and its peers. Neither word, on a tender, tells you 600 versus 625 by itself (you still measure), but in **new German office and school work the 625 mm module is the one to assume until the drawing says otherwise.**

![German Odenwald Rasterdecke metal cassette ceiling with an LED panel versus an international T-bar lay-in ceiling](https://www.olamled.com/wp-content/uploads/h2-odenwald-vs-tbar.webp "Odenwald 625 Grid vs International 600 T-bar Fit")620 mm will not enter a 600 mm bay. 595 mm will enter a 625 mm bay; that is the trap.What actually drops in:

- **Lay-in / Einlegeleuchte.** The panel rests on the T-bar flanges. This is the default for both 600 and 625 modules. Safety cable recommended where there is HVAC movement.
- **Visible T-bar, 600 mm.** International. Panel **595×595**. Same opening as a classic 4×18 W T8 grille.
- **Visible T-bar or cassette, 625 mm.** German/Austrian Odenwald-class. Panel **620×620**. Professional brands sell this as a **625** family.
- **Concealed / clip-in metal cassettes.** The tile is not a lay-in. A standard lay-in panel often **does not** clip. You need the ceiling-system’s luminaire, a project bracket, or a surface/pendant kit. Do not assume 620×620 “because Odenwald.”
- **UK / export 600 mm only.** Do not ship 620×620 as a “European” default to a UK warehouse.

Fit is mechanical. A 620 mm chassis on a 600 mm T-bar **will not enter the bay**. A 595 mm chassis in a 625 mm bay **will enter**, and that is the trap. It looks installed from a ladder at 6 p.m. On Monday the gap is a black picture frame around every luminaire.

Electrical connection in Germany is the job of a certified electrician (**Elektrofachkraft**). Dropping the chassis is mechanically simple. Wiring is not. Specify frame stiffness the ceiling contractor will accept, plus a safety tether; a dish in a tired T-bar is not a reason to pick 595. What happens when there is no grid at all?

## Plasterboard, surface frames and pendant kits (when grid drop-in is wrong)

A 620×620 panel is a **luminaire size**, not automatically a **grid product**. Specify **one engine with three kits**: to insert (lay-in), to hang (pendant), and with a mounting / surface frame. The 625-family datasheet above lists surface, recessed-frame and suspension kits as **accessories**, not as the luminaire.

![LED panel mounting triad: lay-in grid, surface frame and pendant suspension](https://www.olamled.com/wp-content/uploads/h2-plaster-surface-pendant.webp "LED Panel Lay-in, Surface and Pendant Kit Triad")One engine, three kits. A surface frame is not an apology for the wrong grid cut.| Ceiling | Kit | When it is the right call | When it is the wrong call |
|---|---|---|---|
| Rasterdecke / T-bar, module confirmed | Recessed lay-in | New or existing grid, opening measured | You guessed 60×60 from a brochure |
| Plasterboard (Gipskarton) | Recessed springs / plaster frame, or surface frame | Cut-out dimension matches the kit drawing | Dropping a grid panel into a hole with no T-bar |
| Concrete / no void | Surface frame (**Aufbaurahmen**) | Renovation, solid slab | Trying to recess 34 mm into 20 mm of finish |
| High or exposed soffit | Pendant / **Seilabhängung** (optional up/down) | Atria, industrial-looking offices | Using pendant kits to hide a wrong grid cut |
| Concealed cassette | Project bracket or the ceiling maker’s luminaire | Specified with the ceiling | Forcing a lay-in 620 into a clip-in tile |

**Do not use a surface frame as a silent apology for the wrong grid cut.** If the ceiling is a 625 Rasterdecke, order 620×620 lay-in. If the ceiling is plasterboard, order the plaster or surface kit and still state 595 or 620 so the luminous square matches adjacent rooms.

## Linear formats (1200×300 etc.) for corridors: when not to force a square panel

A square 620×620 is the German **office field** SKU. It is the wrong default for a 1.8 m corridor, a workstation spine, or a ceiling that was built around T5 1×4 cells; those want a **1200×300** linear panel (~295 × 1195 mm actual).

![Corridor with rectangular 1200x300 ceiling lights beside a linear modular LED panel product photo](https://www.olamled.com/wp-content/uploads/h2-linear-formats.webp "When Not to Force a Square 620 LED Panel")620×620 is the office-bay SKU. Corridors and 300 mm grids want 1200×300.| Format | Typical actual cut | Use | Do not use when |
|---|---|---|---|
| 620×620 / 595×595 | 620 or 595 mm square | Open-plan bays, classrooms, meeting rooms on a square grid | Corridor centre-line; the grid is 300 mm wide |
| 1200×300 (30×120) | ~295 × 1195 mm | Corridors, T5 1×4 analogue, desk rows | You only stock 620 square and “make it work” with extra fittings |
| 1500×300 | ~295 × 1495 mm | Long corridor runs | Forcing three 620 squares into a linear void |
| 1200×600 | ~595 × 1195 mm | High-output open plan, 600 mm module | 625 mm module; you need the 620-wide analogue, not 595 |
| 300×300 | ~295 mm square | Small fields, 300 mm raster, toilets | Trying to light an open-plan office with them |
| Custom architectural (1100×200, 145×1195, 300×1300, …) | Drawing | Feature ceilings, continuous lines, joinery slots | **Default office stock.** Custom length is a project SKU. |

Do not force a square panel when the grid is **300 mm** in one direction, when the task is a corridor or desk **run**, when the architect has drawn a **continuous luminous line** (PA joins modules inside one frame), or when you are filling a joinery slot: measure the slot; do not round it to 620. Custom lengths are a project SKU, not the distributor’s first pallet. Standard 620×620 and 595×595 first. Further cuts: [LED module panel light](https://www.olamled.com/led-module-panel-light/).

## Spec / RFQ checklist for distributors and contractors

A complete 620×620 / 595×595 panel RFQ states twelve things: the ceiling module, the luminaire cut, the mounting kit, the void depth, the optic class, color quality, the driver, the proof pack, tender extras, certifications, quantity by cut, and a sample of the actual cut. Never write “60×60” alone.

![Measuring tape on a Rasterdecke bay beside a factory RFQ sample pack of LED panels and papers](https://www.olamled.com/wp-content/uploads/h2-rfq-checklist.webp "Distributor and Contractor 620×620 LED Panel RFQ Checklist")Never write “60×60” alone. Count 620 and 595 as separate SKUs.1. **Ceiling system and module.** Odenwald / Rasterdecke / T-bar / plasterboard / concrete. **600 or 625 mm** (measured opening attached).
2. **Luminaire cut.** 620×620 **or** 595×595. Never “60×60” alone.
3. **Mounting kit SKU.** Lay-in / surface frame / plaster springs / pendant. One line per room if mixed.
4. **Void depth and driver location.** Remote driver in the void vs integrated. Safety cable.
5. **Optic / UGR class.** Office floor UGR<19; screen-heavy UGR<16. Prove it in the room, not only on the sticker. Details: [UGR and EN 12464-1 in the Germany guide](https://www.olamled.com/led-panel-light-buying-guide-for-germany-size-ugr-commercial-specs/).
6. **CCT / CRI / SDCM.** German office default **4000 K**, Ra ≥ 80, SDCM < 5 (< 3 in one visual field).
7. **Driver.** DALI-2 project default; 1–10 V or Casambi if the bus is already there. Named gear if the spec locks it.
8. **Proof pack.** LDT, UGR table, DIALux/Relux of this floor plate. Confirm turnaround on the RFQ.
9. **Emergency / sensor / Zhaga Book 18** if the tender asks. Do not add them as a surprise on a stock 620 SKU.
10. **Certs and labeling.** CE, RoHS; ENEC/TÜV/GS if the destination SKU needs them; private-label pack and multilingual manual for OEM.
11. **Quantity by cut.** Count 620 and 595 separately. Mixed buildings are two SKUs.
12. **Sample.** One of the **actual cut**, in the **actual kit**, before the bulk PO.

Copy-paste spec line:

> Recessed LED panel for German system ceiling, **620 × 620 mm** actual (625 mm Rasterdecke / Odenwald) **or 595 × 595 mm** actual (600 mm T-bar); state which, from a measured opening. 4000 K, Ra ≥ 80, SDCM < 5. Mounting: lay-in / surface frame / pendant as per ceiling. DALI-2. Submit LDT and the matching kit SKU. Do not substitute 595 mm into a 625 mm module.

## Common size mistakes factories see on EU RFQs

The ten size mistakes below come from OEM/ODM RFQ patterns at the factory (no named clients). Every one of them is a cut, kit or format error, and every one of them shows up on site as a rattle, a gap or a panel that will not enter the bay.

![Undersized 595 mm LED panel leaving a dark gap in a German 625 mm metal cassette ceiling grid](https://www.olamled.com/wp-content/uploads/h2-size-mistakes.webp "Common EU LED Panel Size RFQ Mistakes")Wrong cut rattles and gaps. That is a size complaint, not a UGR failure.1. **“60×60 for Germany.”** The schedule used the international nickname. The ceiling is 625. The first sample rattles.
2. **Ordering 625×625 as a housing.** The factory builds a chassis that will not enter the bay. The module is 625; the cut is 620.
3. **One SKU for a mixed building.** A 1980s wing on 600 mm T-bar plus a 2015 Rasterdecke on 625. You need both cuts.
4. **595 mm “because it will go in.”** It will. The gap is then argued as a finish defect.
5. **Surface frame to hide the wrong cut** on a perfectly good grid. Extra cost, extra depth, still the wrong product story.
6. **Plasterboard ordered as lay-in.** No T-bar, no flange, nothing to sit on.
7. **Square panels in a 300 mm corridor grid.** They do not fit. Linear 1200×300 was the fluorescent parent.
8. **Custom 1100×200 as the office default.** Beautiful on a feature ceiling; a stock disaster. Keep custom for the drawing that needs it.
9. **Forgetting the kit.** Fifty 620×620 panels and no surface frames for the concrete meeting rooms.
10. **Calling a rattle a UGR failure.** Occupants see a dark halo. The optic is fine. The cut is wrong. Confirm **ceiling commercial panel**, not a camera light, and attach a photo of the opening.

## Which OLAMLED sizes to ask for (PA 620 / 595)

OLAMLED builds **modular, replaceable-engine** commercial panels for OEM / private-label and project supply, in both the **620×620 mm** Odenwald cut and the **595×595 mm** T-bar cut, plus linear and custom lengths. Ask for the **cut**, then the family, then the kit. Do not start from a sealed residential edgelit SKU and hope the frame stretches.

![OLAMLED square modular LED panel and linear modular engine product photos on a white background](https://www.olamled.com/wp-content/uploads/h2-olamled-sizes.webp "OLAMLED PA and PG-2 620 and 595 Size Menu")Ask for the cut, then the family, then the kit.Standard cuts on the [LED module panel light hub](https://www.olamled.com/led-module-panel-light/) and the [PA series modular panel light](https://www.olamled.com/led-module-panel-light/pa-series-modular-panel-light/):

| Ask for | Actual size | Ceiling | Family note |
|---|---|---|---|
| PA / PG-2 **620×620** (OL-PA30W-6262 class) | **620 × 620 mm** | German/Austrian 625 mm Odenwald / Rasterdecke | Default DE office SKU. PA: UGR<19 standard, UGR<16 option, Zhaga Book 18. |
| PA / PG-2 **595×595** (catalog 600×600) | **595 × 595 mm** | 600 mm T-bar; T8 grille replacement | PA FAQ: the 595 cut drops into the same opening as a 600×600 grille. |
| 300×1200 | **295 × 1195 mm** | Corridor / T5 1×4 analogue | Linear modular; do not substitute squares. |
| 300×1500 | **295 × 1495 mm** | Long corridor | Custom-leaning stock size. |
| 600×1200 | **595 × 1195 mm** | High-output 600 mm module | Check 625-wide analogue if the grid is 625. |
| Custom length (e.g. 1700 × 150 mm class) | Drawing | Feature / continuous run | PA modules join inside one frame; use when the square grid is the wrong tool. |

The [PG-2 series UGR<16 panel](https://www.olamled.com/led-module-panel-light/pg-2-series-modular-panel-light/) lists **620×620** and **595×595** (and linear cuts). The [CD series UGR<15 louver panel](https://www.olamled.com/led-module-panel-light/ugr15-led-modular-panel-light-cd-series/) is the choice when the glare brief is already tight; still state the cut. Drivers: On/Off, 1–10 V, DALI-2, Casambi. Recessed, surface or pendant kits on the same engine.

Distributor / OEM path: [SKD LED panel light supplier](https://www.olamled.com/skd-led-panel-light-supplier/) (local assembly of the cut you actually sell) and the [LP modular panel light program](https://www.olamled.com/lp-modular-panel-light/). Product-family comparison: [LED modular panel light product hub](https://www.olamled.com/product/led-modular-panel-light/).

## FAQ: 620×620 LED panels for Odenwald ceilings

These questions come from OEM RFQs and public German size pages, not from fabricated search scrapes. Each answer is short enough to paste into a tender query.

![Finished commercial office lit by a recessed LED panel ceiling grid](https://www.olamled.com/wp-content/uploads/h2-faq.webp "620×620 Odenwald LED Panel FAQ")Questions from RFQs and public DE size pages.### Will a 60×60 LED panel fit a German Odenwald ceiling?

Usually **no**. A catalog “60×60” is a **600 mm module** with a **~595×595 mm** chassis. Odenwald / 625 mm Rasterdecke wants **620×620 mm**. A 595 mm panel will physically drop in and then rattle and gap. Measure the opening.

### Why do catalogs say 625×625 if the panel is 620×620?

**625 mm is the ceiling grid.** **620 mm is the luminaire.** LEDVANCE’s PANEL COMPACT 625 family is named for 625 × 625 mm ceiling systems and dimensions the housing at 620 × 620 mm. Treat 62×62, 620×620 and 625×625 as the **same German SKU class**, then confirm the millimeters on the drawing.

### How do I measure so I order the right cut?

Tape the **clear opening** between T-bars, both ways, in millimeters. ~610 mm class → 595×595. ~635 mm class → 620×620. Photograph the tape in the bay. If there is no T-bar, you are in plasterboard or concrete: pick a kit, not a guess.

### Can I use a surface frame if I ordered 595 mm for a 625 mm grid?

You can hang or surface-mount a 595 mm panel **on a solid ceiling**. You cannot make a 595 mm lay-in look like a 625 mm tile. On a Rasterdecke, return the wrong cut or use a proper **insert frame** as a one-off rescue, then correct the SKU for the rest of the floor.

### When should I use 1200×300 instead of 620×620?

Use 1200×300 in corridors, T5 1×4 replacements, and any ceiling whose module is 300 mm in one direction. A square 620 is an office-bay luminaire. Forcing it onto a corridor centre-line wastes fittings and looks like leftover stock.

### Does panel size change UGR?

Not by itself. UGR is a **room** result (optic, layout, reflectances, observer). A 25 mm gap around a 595 mm panel in a 625 mm bay **does** change what occupants see, as a dark halo and a rattle, which then gets blamed on glare. Fix the cut first. Then specify the optic with the [UGR guidance for German offices](https://www.olamled.com/led-panel-light-buying-guide-for-germany-size-ugr-commercial-specs/).

### Are video or photo LED panels the same product?

No. This article is about **ceiling commercial LED panels**. Camera lights (NEEWER, Nanlite) and therapy panels are different products that collide on the English query “LED panel light.”

## Order the cut, then finish the spec

620×620 versus 595×595 is not a styling choice. It is a **ceiling-module decision**. German Odenwald / Rasterdecke work defaults to the **625 mm grid and the 620 mm panel**. International T-bar defaults to **600 / 595**. Linear 1200×300 is for corridors. Custom lengths are for drawings that the square grid cannot serve.

![Finished German-style open-plan office with a recessed 620x620 LED panel ceiling grid](https://www.olamled.com/wp-content/uploads/h2-cta-order-the-cut.webp "Order 620 or 595, Then Finish the German Spec")Measure → 620 or 595 → kit → UGR / 4000 K / DALI-2.Return to the [LED Panel Light Buying Guide for Germany](https://www.olamled.com/led-panel-light-buying-guide-for-germany-size-ugr-commercial-specs/) for UGR, 4000 K and DALI-2 on the same specification. For a DIALux pack, a 620×620 sample (MOQ 1 on the modular program) or an OEM / SKD RFQ, use the [modular panel program](https://www.olamled.com/lp-modular-panel-light/), the [SKD LED panel light supplier](https://www.olamled.com/skd-led-panel-light-supplier/) page, or [contact OLAMLED](https://www.olamled.com/contact/).