The Domus PANEL-BLT-303 is a 300300mm backlit LED panel forgrid and plasterboard ceilings, with a flicker-free driver andswitchable 3000K / 4000K / 5700K, inTrio (dip switch) or DALI.

Two figures on this listing disagree with the datasheet, and we wouldrather tell you than pick one.

The 4000K and 5700K figures match exactly, so this is two specific numbers out ofstep, not two different products. If the wattage matters to your job an energycalculation, a circuit schedule, a lighting design ask us and we will confirm it with Domus inwriting. For choosing a light for a room, treat it as a ~1012W panel giving about1,000lumens.

Backlit, and why it is not the same as an edge-lit panel

• The LEDs sit behind the diffuser across the whole area, rather than around the rimfiring sideways into a light guide.
• The face lights evenly right to the edges no dimmer corners, no faintbanding, and no yellowing light guide in five years.
• It is more efficient, because the light does not have to travel across a panelbefore it escapes.
• It is slightly deeper at 32mm. In a grid ceiling that isirrelevant; in a shallow plasterboard void, check it.

Trio or DALI and a question to settle before you order the DALI

• Trio colour temperature set by a dip switch on the cable, beforeinstallation. The residential and small-commercial choice.
• DALI addressable digital control, for a building with a lighting controlsystem. Each fitting has an address and can be commanded individually.
• Our record says this fitting is not dimmable, and it also lists a DALI variant. Those twostatements cannot both be right DALI exists to dim and address fittings digitally.If you are specifying the DALI version into a control system, confirm the dimming behaviour withus first.
• Only the Trio variant appears in the datasheet’s own item table, so the DALIversion’s figures are not independently confirmed here.

The flicker-free driver

Domus fits a harmonic filter to reduce total harmonic distortion, which is whatcauses visible strobing and the headaches and eye strain some people get under cheap LED panels.

• It matters most where people sit under it all day an office, a classroom,a study and where cameras are used, because flicker shows as banding on video.
• It is a genuine specification difference, not a marketing line: standard LEDdrivers that are not flicker-free are the reason panel lighting has the reputation it does.

Mounting three ways

• Straight into a standard T-bar grid ceiling in place of a 300mm tile. No extraparts.
• Plasterboard, with an optional plaster trim kit.
• Surface mounted or wire suspended, with the optional kit, where the ceiling cannotbe cut.
• Three mounting methods, three different optional parts. Tell us the ceiling and wewill list what you need.

Where it works

• Offices, classrooms and studies flicker-free matters where people sit under it.
• Grid ceilings in commercial fit-outs.
• Kitchens, laundries and hallways at home, with the plaster trim kit.
• IP20 dry interiors only.
• Not dimmable on the Trio; confirm the DALI’s behaviour with us.
• Confirm the wattage with us if it feeds an energy calculation.

Specifying it

29529532mm backlit LED panel for a300mm grid module. Power: this listing says 12W, the datasheet says 10W confirm with us if it matters. Output ~860900lm (3000K),1,000lm (4000K), 1,100lm (5700K), switchable. High-efficiency SMD,CRI 80, 40,000hrs. Flicker-free driver with a harmonicfilter. 240V AC, IP20. White frame, opal diffuser.Trio (dip switch) or DALI. The record says not dimmable while offering a DALIvariant confirm before specifying into a control system. Recessed into a grid ceiling,or plasterboard / surface / suspended with optional kits. Warranty 3 years.

Supplied and supported by Lights For You.

Questions

Is it 10 W or 12 W?

The title and our record say 12W and the datasheet says 10W, and we are not going to quietly pick one. The lumen figures make it clear this is a numbers problem rather than two different products: the 4000K and 5700K outputs match the datasheet exactly and only the 3000K figure differs. If the wattage feeds an energy calculation or a circuit schedule, ask us and we will confirm it with Domus in writing.

What is the difference between backlit and edge-lit?

Where the LEDs sit. In a backlit panel they are behind the diffuser across the whole area; in an edge-lit panel they are around the rim, firing sideways into a light guide. Backlit lights evenly right to the edges with no dimmer corners or faint banding, is more efficient because the light does not travel across the panel before escaping, and has no light guide to yellow over time. The trade-off is 32mm of depth instead of about half that.

Should I get the Trio or the DALI version?

Trio for a home or a small commercial job the colour temperature is set with a dip switch on the cable before installation and there is nothing else to configure. DALI only if the building has a digital lighting control system, where each fitting gets an address and can be commanded individually. If you are specifying the DALI version, talk to us first: our record says the fitting is not dimmable while also offering DALI, and those two statements cannot both be right.

What does “flicker-free” actually mean here?

Domus fits a harmonic filter that reduces total harmonic distortion, which is the cause of visible strobing and of the eye strain and headaches some people get under cheap LED panels. It matters most where people sit under the light all day offices, classrooms, studies and where cameras are used, because flicker shows up as banding on video.

How does it mount?

Three ways. It drops straight into a standard T-bar grid ceiling in place of a 300mm tile with no extra parts. It goes into plasterboard with an optional plaster trim kit. And it can be surface mounted or wire suspended with another optional kit where the ceiling cannot be cut. Three methods, three different parts tell us the ceiling and we will list what you need.

Can it go in a bathroom?

No. It is IP20, which is dry interiors only. For a bathroom ceiling you want something rated at least IP44, and we can point you to one.

Is a 300 300 panel bright enough for a room?

About 1,000 lumens covers a small area a hallway, a laundry, a WC, a small office or works as one of several in a larger grid ceiling. For a kitchen or a full-size office you would use several, or step up to a larger panel. Tell us the room and we will work out the count.