New Icon Irix Headlamp

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Thanks for the tip mellowman. How did you figure on the 85% efficiency number? Is there a formula to figure that out or was that just a rough estimate?
 
Rough estimate. Generally converter losses are 15-20% in conversion, which in this case the driver is a boost converter.

edit: Efficiency is a function of the difference in conversion. Given the voltage differences between High and Low the efficiency should be better at Low than High. If you continue your test we should be able to figure it out. Might turn out better than 85%.
 
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Here are the IRIX I and IRIX II @ 48 hours at midnight last evening. Still going strong at 60 hours now.

IRIXlights-48hours.jpg


The middle light is a Quark AA running a AAA Duraloop. I expect that to get at least 100 hours, so we will see.
 
@ Beacon of Light,

Since you have both headlamp, can you find out something for me?

I know the Iris II 5mm led are protrude, therefore will have glares for people with eyeware.

What about the Iris I? It seems like the 5mm led is not protrude. Does it still have glares for people with eyeware?

TIA.
 
I don't wear eyeglasses, but last night I rotated them both while wearing pointing down as far as it goes and it didn't glare. Not sure if wearing glasses would change that at all.
 
Some duct tape, maybe a few layers, on the bottom front edge below the two leds should stop any glare issues unless rotate all the way down, in which case any headlamp would give you glare.

Alternatively, one could paint the bottom edge of the two bottom leds.
 
Great tip mellowman. I thought I remember a similar tip to one of those Energizer Headlamps (Hardcase?) that had this problem until Energizer revised it with dark black plastic instead of the earlier see through translucent plastic.
 
IRIX I & II @ 74.5 hours

IRIXat745hours.jpg


IRIX I is already past it's posted 72 hour runtime. No signs of dimming so far.
 
Captain Spaulding said:
Wow nice.

Im curious why the Irix I is rated at lower run time than the Irix II if the I only has 4 LED's on when on low and the II has 5 on. Anyone?
Click to expand...

Not sure either as the IRIX I on low the LEDs are a little dimmer than the IRIX II on low. And around 4 or 5am (76 or 77 hours) the IRIX II was off. The IRIX I is STILL going heading towards 96 hours if it makes it to midnight. Wondering if Icon goofed and mixed up the data where the IRIX I has a 100 hour runtime and the IRIX II is 72 hours? Not sure...
 
IRIX I stopped at 12:30am so total runtime is 96.5 hours!!! Checking the voltage it was .92v
 
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Beacon, what NiHm bats were you using? 2000 mAh Eneloops?

Yea, the given lower runtime number on the Irix I doesn't any sense given the center LED doesn't light up. Now that I think about it the lumen numbers don't make much sense either, that center LED on the Irix I should put out more lumens than 1 of the 5mm LEDs.
 
mellowman, the IRIX I had the HIGHER runtime than the IRIX II. The center LED does light up once you are around 50-60% to high power.
 
Beacon of Light said:
mellowman, the IRIX I had the HIGHER runtime than the IRIX II. The center LED does light up once you are around 50-60% to high power.
Click to expand...

Hey Beacon of Light,

Is it possible to get a beamshot on the wall of the 4 5mm led and also one with all the led on for the Iris I? I might be interest in one depending on the beam profile.

Also, how comfortable is the holder pressing against your head? The Rayvoc(?) 1AA headlamp holder is not very comfortable. Left an deep imprint on my forehead.
 
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So Beacon, can you tell which is brighter on high? Do you think the lumens on HIGH is mixed up too, or do you think just the runtime on LOW is mixed up?

They are both rated at 5 lumens on low and I can see why the Irix I has more runtime with only 4 LEDs on but Im curious if the Irix II is really 50 lumens on high.

Is the 5th LED on the Irix I actually different, or is it just using a reflector?


or am i just confusing myself... ?
 
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