Every figure, with the band it is allowed to sit in.
A specification without a tolerance is an advertisement. Each line below carries the target, the band we accept, the figure measured on serial 14-0007, and the standard we measured it against. Any lamp outside its band does not leave the workshop.
Nine figures, drawn as bands.
The amber block is the accepted band; the dot is serial 14-0007 as it measured on 2 February. Hover a row to read the standard.
Electrical, mechanical, and the paperwork.
- Supply
- 220–240 V, 50/60 Hz, 0.4 W standby
- Control
- DALI-2 (DT8 tunable white) and 0–10 V, 0.1–100 %
- Local control
- Rotary encoder, 24 detents, two of them hard stops at D50 and D65
- Dimensions
- 1 204 × 96 × 74 mm, drop 300–2 000 mm
- Mass
- 4 612 g net, 6 240 g crated
- Ingress
- IP20, indoor, 0–35 °C ambient
- Life
- L90 B10 at 50 000 h, 25 °C
- Conformity
- EN 60598-1, EN 62471 risk group 0, EN 55015, RoHS
What we will not certify.
- Any figure measured by anyone other than us on serial 14-0007. We will not reprint a distributor's number.
- Performance above 35 °C ambient. We have not tested it and the driver derates somewhere above there.
- Colour consistency between a lamp from batch 14 and one from batch 3. Binning changed in 2021; a 2019 lamp sits about 60 K warmer.
- Anything to do with UV or blue-light hazard beyond risk group 0. The lamp is exempt; that is all we will say.
Serial numbers are stamped into the gland cap, not printed. Ours start at 09-0001.
The only number that ages.
Flux, colour and flicker are stable for the life of the board. Heat is the one figure that decides how long that life is, so it is the one we design the whole extrusion around — 60 mm of still air above the fins, and a board that settles at 34 °C and stays there.
Questions about the sheet.
Why is the illuminance quoted at 1 400 mm and not at one metre?
Because 1 400 mm above a 760 mm bench puts the lens at 2 160 mm, which is where a standing adult's head is not. Quote it at a metre and the number looks better and the lamp is in your way.
What does “uniformity 0.63” mean in practice?
The darkest of the nine points is 63 % of the brightest. The eye starts noticing a gradient at about 0.4, so at 0.63 the bench reads as one flat field. A bare strip without the batwing lens measures 0.28 on the same grid.
Can I run two lamps from one DALI address?
Yes, up to four. They will track within 40 K of each other across the whole range because the drivers come from one reel and we bin them in fours. Tell us at order and we will keep your set together.
Does the output drop over eight years?
L90 at 50 000 hours means ninety per cent of day-one flux after roughly twenty-four years of normal studio use. Colour moves less than flux: we have measured batch 9 lamps at 11 000 hours and they had shifted 18 K.
Is there an emergency or battery version?
No. We built one in 2021. It weighed 7.9 kg, held 22 minutes, and the cells disliked sitting at 34 °C. It is not coming back.
What happens if a figure fails on my lamp?
It never leaves. If it fails on your bench inside eight years we collect it, measure it here, and either repair it or build you a new one. Twenty-three lamps have come back since 2017; nineteen were drivers.
Take the sheet to your electrician.
Then come back and tell us what they said. Half the changes we have made since 2017 came out of that conversation.