All the answers given in the thread are assuming he is going to drive it at higher currents than spec.
The XP-L HI is still the best “factory dedomed” LED from cree, with XHP35 HI being second and giving more lumens.
By the way, does anyone know what voltage the XP-L HI run off? I haven't been able to find anything on Mountain Electronics or Fasttech's websites.
3.xxV depending on the current.
Thanks. That means I can run it off a direct driver FET driver?
Thanks Agro. I had no idea anyone still had these for sale. Just ordered 5. :+1:
I did not mean running stock.
It’s just that both XP-G2 and XP-L HI have Vf at their peaks exceeding 4.2 V and therefore for best performance need 2s input and a buck driver. Which happens sometimes, but nevertheless is a rare option.
XHP35 HI needs boost driver regardless of how hard it’s driven (or rare 4+s), but few drivers are capable of running it at the peak.
See XP-L HI 1A V2 LED Output test by Texas_Ace, Well, you have seen the HD, this is the HI. It is exactly what you expect. and XHP35 output and death test + PWM efficiency test by Texas_Ace
You can run it with FET to get about 90% peak performance. With a fully charged battery. At this point it will offer about the same cd as XHP35 HI driven to the max, but with less heat. And far less lumens.
Thanks
Does anyone know an LED that can run off of 5v @ 2a? I want to use one on my racing drone but I can only use the onboard power distribution board unless I add some sort of onboard regulator.
I would figure that a very small dc dc boost or buck converter that can handle your LED’s wattage would do, they are very lightweight, easy to wire up.
Would you be able to give me a suggestion for one?
What is your RC’s battery pack voltage?
16.8v
Thanks SO much
You’re not wrong, it’d depending on the current draw of your LED you’re wanting to run, I didn’t want to suggest anything under-powered.
Why isn't there any talk on the newer Cree XP-L2? Since it is more efficient than the XPL-HI, shouldn't a de-domed one be able to throw farther than the XPL-HI same current draw? I'm currently considering either a de-domed XP-L2 or a de-domed Luminus SST-40, does anyone have a comparison of the two?
Yeah, but OP specifically said “no dedoming”
Yes a dedomed XP-L2 or SST40 will perform better.
Yeah, I've changed my mind now. I don't really mind the tint so that is no longer a problemo. Do you know which would get higher lux dedomed? I'm leaning on the SST-40 due to higher lumen output, but maybe I'm missing something
Are you still interested in cree LEDs only?
Because the black flat is still the best from Osram.
dedomed SST40 would be a good option if you want more lumens and still great throw.