Long time ago I found Citizen LEDs. They are very bright, efficient and small enough to fit in Maglite.
I started thinking about building video light around this LED.
Recently it finaly started to come into reality.
First step was when George released HBFlex, high voltage boost driver with microprocesor (originaly I was planning to use Hyperboost but I really wanted at least low and high and thermal protection - had couple ideas how to solve these but at cost of added complexity). This allowed to use of pizeo and simplified a lot of things.
Second most important thing was that Will was kind enough to help with machining part.
Here are some pictures of components and almost ready light (I'm waiting for different screws to hold a LED and couple of o-rings). Still didn't decided if I should use glass lens or polycarbonate. I have both in required size.
Parts for the head. Finally all important are here.
Assembled. No o-rings, gland not closed, just to see how it will look (piezo is glued in already, tube and head are glued together as well).
Test. It works. Low level, measured current from battery 104 mA
Canister parts. Battery back is 15 panasonic cells 5s3p with protection board with equilibrium function (balancing cells).
Board used in battery pack.
This is how it will look when finally assembled. Wet connector on canister will be also used for charging. Charger has the same cable as head just shorter.
HBFlex is set currently to 1.5A, I can safely (within LED spec) push it to 2A. At 1.5A it should be giving about 6000 OTF (maybe little less). I can't measure it, it is too much for my "milk carton" integration sphere. I measure max output when HBFlex was set to 700mA and it was in 3000lm area (my “sphere” is “calibrated” using different light with “known” lumen outputs).
Currently when on high power draw from batteries is 63.4W. Battery pack should easily last for more than 2h.
Distance to trees is about 30ft (light is intended to be used at much smaller distance - 5-10ft).
All 4 photos taket with ISO 100, f/6.3, 4sec
Malkoff Hound Dog XP-G and Surefire Invictus, both on max.
"Citizen Mag" on max, alone and together with Invictus on max.
As you see, total flood.