Why the number matters more than the name
"I have a grey Lumeno with a big lens" — unfortunately we cannot do much with that. On the type plate or the invoice, however, it says something like 8515GR-MKIII, and everything necessary can be read from it. Once you know the system, you save yourself every follow-up question about spare parts, power supplies and lenses.
The four digits: series and strength
The first three digits denote the series, the last digit gives the dioptre figure.
- …3 = 3 dioptres
- …5 = 5 dioptres
- …8 = 8 dioptres
An 8213 is therefore the 821X series with 3 dioptres, an 8215 the same lamp with 5 dioptres. The same applies to 7213/7215/7218, to 8513/8515 and to 8613/8615. When we speak of the 821X series in datasheets, the X means exactly that position: the series regardless of lens strength.
What distinguishes the series
The series number says something above all about lens and power supply:
| Series | Lens | Power supply |
|---|---|---|
| 721X | 127 mm round | 20 V |
| 821X | 127 mm round | 20 V |
| 851X | 152 mm round | 24 V |
| 861X | 110 × 150 mm oval | 20 V |
Above all, remember the 851X. It is the only main series with 24 volts instead of 20 — and therefore the most frequent mix-up when ordering a replacement power supply. Which power supply belongs to which lamp we have compiled in a separate article.
The letters: the colour
The suffix after the number describes the version of the rubber guard or the housing:
- GR – grey
- GN – green
- SW – black
- WS – white
For spare parts the colour is almost always irrelevant — but not for clamps, cover rings and base rings, because they remain visible. So please quote the suffix as well.
MKII and MKIII: the decisive generation
No detail is asked about more often, and none matters more in a service case:
- MKII – the transformer is built into the unit. The lamp has a fixed mains cable.
- MKIII – the lamp works with a separate power supply sitting outside.
From this it follows directly: a defective power supply can simply be replaced on an MKIII, but not on an MKII — there the electronics sit inside the lamp. Why we moved to external power supplies altogether is explained in the article on extra-low voltage.
The "MK" itself stands only for the edition: a revised version of the same lamp, not a different product.
PRO and named series
Besides the plain numbers there are equipment variants. An 824XPRO, for instance, is the 824X series in the PRO version — on this model with a metal housing, dimming and segment switching. The suffix therefore marks a higher-grade equipment level of the same series, not different optics.
Alongside these, individual lamps run under names instead of numbers, such as the Lambda series. Here too: for spare parts the full designation on the type plate is what counts.
Where to find the designation
On the type plate on the underside of the lamp head or on the power supply, and additionally on invoice and delivery note. There you will also find voltage, current and power — exactly the details we need for a matching replacement power supply.
A note for owners of older units: type plates up to around 2019 still name the predecessor company. That is not a sign of counterfeiting — the company was taken over in 2021 and integrated into zalias. Your lamp is the right one, and we continue to look after it.
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