Hmmmmmmm, wonder what I can make with the new LEDENGIN LZP LED, up to 5650 lumens. Powers at 90 watts. Here’s a picture of this LED I just received, and the huge optics (15 degrees) that goes with it.
Wayne
Dang! That's twice what the new Cree MT-G2 puts out! 
Edc? J)
EDC if you have very loose pants and very big pockets!
Wayne
And that's just to put the miniature nuclear power plant in. What is the dimensions on these items elektrolumens. I gather you will have the flashlight finished in the next day or so, so that we can stop dribbling. Please.
I was thinking of a rucksac….
Can you get a good close-up of it, I want to see whose chips they are using, they appear like they might be Cree.
Wow! I saw this on cutter's banner ad,what a monster this thing is.Whatever you decide to do,make sure it tailstands and has a pocket clip
Actually, as I said, I just got it a few days ago. Just kind of excited about the LED. I probably should not have posted anything about it yet. Anyway, looking for feedback on design. I’m thinking of 5 or 6 26650’s for power, probably 5, and making a long C cell diameter flashlight, with a head about 3.5” diameter. Maybe two switches like the ST90. ?? Problem with this LED is that it is very expensive, so I’m thinking to keep the design as simple as possible to keep costs down. My big 4” reflector I use in the ST90 works, but it means a much bigger diameter head, and this means more costs. I’m not trying to make a cheap flashlight, but just trying to keep costs down. Rating of 5500 lumens is modest, if driven at around specs, and, well, I’m know to have quite a disregard for running things modestly. The beam is pretty good, but not a narrow beam like the ST90, but, I suppose a narrow beam at this brightness limits it’s usefulness to only spotting things a long ways away, or impressing flashaholic friends.
Wayne
Cree also sells these big guys.
http://www.cree.com/led-components-and-modules/products/xlamp/arrays-nondirectional/xlamp-cxa2520
Why is nobody using them in flashlights? They do need lots of power, but not more than the 7/9 XML lights around …
The way I wired it is temporary, just so I can test it.
Wayne
Maybe because they are new, and maybe because they are expensive? Probably not a lot of major flashlight makers will be using it.
Wayne
i dont know why but the first thing i thought when i saw that was…
overdrive it to 120 watts
5650lm at 90W? Just 63 lm/W? meh.
As with any LED, the harder you drive it, the lower the lm/W. The LZP is 100 lm/W at 350mA (per LED die). What I’m looking at is how bright the LED is and how small it is. It’s not the most efficient, though. Neither is my big Chevy 3500 crew cab duelly truck, with it’s 454cid engine, either (I call it my ‘Global Warmer’).
Wayne
What voltage does the emitter need?
I say, throw a 9-inch frosted reflector on it and let’s see what it’s made of.
Its definitely not efficient by todays standards. He might be after maximum surface brightness in a smallish 12mm x 12mm area. LedEngin also manufacturers optics for the emitter and claims a nice uniform beam pattern at 80% efficiency. This alone would eliminate the frustration of focusing the beam through trial and error, if the intent was to have one without artifacts.
A few interesting claims from the data sheet:
Key Features
o Highest luminous flux / area single LED emitter
o 5500lm Cool White
o 40mm² light emitting area
o Compact 12.0mm x 12.0mm x 6.7mm package
Here’s the data sheet link.
This emitter appears to be about a year old so I wonder if other manufacturers have a more efficient comparable alternative yet. I suspect the LZP will do best for its intended purpose (inside permanent fixtures for area lighting) but the flashlight build should be quite interesting.
That LED and optic should make a really nice medium beam. How’s the spill from the optic?