How to identify Luxeon I, III, V, K2?

adsl_keeki · Dec 8, 2006

Hi! I have a bunch of high power LED flashlights and I would like to identify what Luxeon bulbs do they use. All I see is "Lumiled" printed on the LED star heatsink after removing the reflector and glasses. The heatsink is attached to a large aluminum heatsink with thermal epoxy, so I can't read the model number printed at back of the star heatsink.

Anyone?

yellow · Dec 8, 2006

I and III is very difficult (there is the "so-say" that they might be the same, just when tested the better ones get binned to be "III")
V is with a much larger emitter die (VISIBLE larger), as this accomodates 4 emitters in square.
K2 has a square black plastic base and 4 solder tabs instead of just 2

Robocop · Dec 8, 2006

It may be my imagination however I have about 10 of the LuxI stars and maybe 5 of the LuxIII stars.....every one of the LuxIII stars is a little thicker as far as the actual heat sink star section. They actually "feel" a little more heavy and robust also.....it also seems as if the LuxIII leads are a little wider as well.

IsaacHayes · Dec 8, 2006

Also the K2 will have a hexagon reflector cup.

The luxeon1 stars will have a thinner aluminum. The lux3 stars are thicker, and have a thicker pcb, with a hole cut out in the center for the slug to touch the aluminum directly. The lux3 on stars have thicker leads too.

Bare emitters will be hard to tell on lux1/3 though.

evan9162 · Dec 8, 2006

I can shoot some pictures when I get home

evan9162 · Dec 8, 2006

Lux I star

Lux III star

Lux I and Lux III emitter (they are visually identical - the power leads were bent by me)

Lux V emitter

Lux V star

K2 - lumileds does not make a K2 star, this was mounted to a star board by a third party

Handlobraesing · Dec 8, 2006

adsl_keeki said:
Hi! I have a bunch of high power LED flashlights and I would like to identify what Luxeon bulbs do they use. All I see is "Lumiled" printed on the LED star heatsink after removing the reflector and glasses. The heatsink is attached to a large aluminum heatsink with thermal epoxy, so I can't read the model number printed at back of the star heatsink.

Anyone?

There's really noway to tell Luxeon I and III apart by the emitter for white, green, blue, or royal blue.

The Lux III die is 4x the size of Lux I on red, amber and red-orange.

How to identify Luxeon I, III, V, K2?

adsl_keeki

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