Lux III SYAK emitters from Future Active

[Gadget_Guru]

Howdy all,

I just received a batch of ten white Luxeon III Lambertian high-dome emitters from Future Active. Since they're not taking small orders for particular bin codes, I didn't know what I'd get 'til they arrived. The invoice states that they are SYAK, so they're supposed to be a little bluish. They are, to my eyes, but not bad.

I made a simple quick-change heatsink holder so I could test them all. I used my old digital bench power supply to adjust and monitor current, and a DMM connected directly to the emitter's leads to measure forward voltage.

What follows are the resulting numbers:

The forward voltages seem to be pretty consistent, as they should be for emitters of the same bin code. Some of these will go in flashlights, others will be used as under-cabinet lighting in some custom cabinets, some will be used for efficient low-power lighting in a Vermont cabin with no AC power.

Would have been nice to get TWAKs, but beggars can't be choosers, I guess.

 

[kj]

Great data! Thank you for sharing this.

 

[MR Bulk]

Actually this has been my favorite Bin, at least color-wise. They ain't too shabby in the brightness department, either...

 

[Chop]

Yea, I had a chance to get in on some of those and like an idiot, I passed it up.

 

[Justintoxicated]

Wow they must run through tons of those things, When I got mine a week or so ago I got 2 SX1J's I can barley see any color difference in them at all especialy when driven at full power...How blue are the YO? I can see a slight ting when not focused now that my alkalines have drained a bunch...

I really was hoping to get T-bins but I heard I should not order untill april to get them...

I just measured mine runing about 480ma and 3.24V How do I calculate power P = I^2 R??? V= IR 3.24 = .45*R R=7.2 P = 1.45 watts?

Did I do this math right...? I thought J was lower voltage Bin than K So does this just mean it uses less power? Or that it's less suseptable to overdriving or what?? I must be doing something wrong? Sorry I'm a bit rusty..

Im still n my origional 3 batteries, i bought more to play around but the damn things just won't die on me!

 

[acusifu]

The SYAK binned Lux's have a bright, nice color to them. If you can get these you will be happy.

 

[MR Bulk]

Hmmm, wonder how Acusifu knows? /ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/grin.gif

 

[trailhead]

[ QUOTE ]
Justintoxicated said:

I just measured mine runing about 480ma and 3.24V How do I calculate power P = I^2 R??? V= IR 3.24 = .45*R R=7.2 P = 1.45 watts?

Did I do this math right...? I thought J was lower voltage Bin than K So does this just mean it uses less power? Or that it's less suseptable to overdriving or what?? I must be doing something wrong? Sorry I'm a bit rusty..

[/ QUOTE ]

I think an easier way of calculating power with your numbers is P=IxE, for 1.55 watts. Other factors being equal, lower Vf= lower power consumption.

Cheers
Duane

 

[IsaacHayes]

I have a question. So if you have a LuxIII Vf of K, and a Lux1 Vf of K, the LuxIII will have a lower Vf at 350ma vs the Lux1 since it's rated at 700ma correct?

So if you wanted to get the most out of a boost circuit/runtime, it's best to get a LuxIII for the even lower Vf at 350ma than a Lux1?

 

[Justintoxicated]

ok cool, but what value is E?

Isaac, thats what I have been thinking exactly, and why I may use the SX1J in a mini mag with the Ill Pill, because it seems to consume less power, then again I don't understand how the circuit works so maybe it woud not help at all...

I know my light is still very bright at 480ma still kills my stock maglight with fresh batts...its taking FOREVER to drain them enough so I can justify putting new batteries in though lol...

 

[trailhead]

[ QUOTE ]
Justintoxicated said:
ok cool, but what value is E?

[/ QUOTE ]

Sorry, E is voltage, from IIRC "Electromotive force".
Duane