Displaying reviews posted
by certified DX gadget owners first, followed by all other posted reviews.
Very bright replacement for Bike light
Posted by
Hobbyfotograaf
on 2/5/2010
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Expert (understands the inner workings)
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1 day to 1 week
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Pros: I bought three of these to replace te leds of the bike-lights (sku18307). The original leds were blue, and not very bright.
Simply replacing the original leds with these XR-E R2 leds makes these bikelights very bright (and white instead of blue).
Cons: No cons, these are just perfect.
Other Thoughts: First ordered Q5 leds, but these were out of stock. These were a bit more expensive, but they should be brighter then the Q5 withe the same powerconsumption.
I used some thermal paste on the edges of the star to be sure the led won't overheat.
Bottomline: These are very good, if the star fits, then it is very easy to replace older leds with these superbright ER-X R2 leds.
One of the best CREEs currently available
Posted by
zmeios
on 4/4/2009
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Expert (understands the inner workings)
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1 day to 1 week
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Pros: This is a great power LED. I coupled it with a small heat sink and a current source @ 700mA. Works like a charm. Transfers heat well to the sink (be sure to use a tight fit and good thermal paste). Aluminum star is not electrically connected to anything, so you can tie a few of those to the same heat sink, without isolation.
Cons: People say this is on a 'large' star which doesn't see much use in modern flashlights. I cannot comment on this, as I put it on a separate assembly, and size wasn't a problem.
The light has some ripples at the end of the cone, maybe not the best solution if you are looking for a really sharp viewing angle.
Other Thoughts:
Bottomline: Absolutely worth every cent I paid. Made a great reading light with a few DIY additions (heatsink, LM317 driven off an USB +5V supply, and a few resistors)
Good Value
Posted by
smelly
on 1/20/2009
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General (knows how to use it)
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1 week to 1 month
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Pros: I have no light meter but as far as I can tell by eye this LED is a little brighter than my Q5 LEDs and a match for my other R2 LEDs.
Cons: The only con as far as I'm concerned is the fact that it comes on such a large star, I needed to remove it and resolder to a smaller one for my needs. These days there are few torches/flashlights that use such large stars.
Other Thoughts: I'm sure that if Dealextreme made these available on smaller stars they would sell far more.
Bottomline: This R2 LED is well priced when you compare it to the Q5 LEDs on offer. It's just a shame about the size of the star.
Top led in the world
Posted by
lucasl1
on 12/20/2008
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1 week to 1 month
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Pros: Bought 10 and they are the best that i ever seen no problem to solder and all are working ok This led has the best ratio lm/W
Cons: starting to 50ma till 500ma seems that Q5 at low current are best, but if you increase R2 was little better.. very few quantity on all world market :(
Other Thoughts: Very few quantity on all world market :(
Contacted by mail Cree, Inc., They said "We do not have this on our datasheets nor do we offer these parts abroad due to the low amount produced"
Bottomline: I will take others in the future when available