Hello everyone! This is my first post on this forum, although I've been reading it for some time without having made an account. I don't have many flashlights in my collection, as I haven't yet run into any cases where a different flashlight would have been that much more useful.
Until now, I suppose! I am someone who likes to get my hands working on something my brain has put together- in the past I've built things like theremins, banjos, the beginnings of a Tesla coil, and so on. Upon learning of 100w COB LEDs, and with inspiration from the late Samm Shepard, I spent a bit of time hand-making a design in GIMP for my own super-high power LED array.
Here is what I've come up with.
I'd like to go into some more detail before I ask for feedback.
Breakdown of Diagram:
- 11.1 Volt LiPo Battery/Batteries in Parallel
- Power Switch
- Pump/Reservoir Combo
- Fan/Heat Exchanger Unit
- CPU Cooling Block
- Boost Converters, from 11.1v to ~36 v, ~3a
- COB LED Array & 60° aspheric lenses
The red wires are positive, dark blue are negative, and the thicker light blue lines denote vinyl tubing for the liquid cooling system.
How will it work?
With the current design, operation will work as follows: a 11.1 volt charge (from 1) is sent to the on/off switch(2).
When the system is switched on,the pump/reservoir (3) will send water through the heat exchanger (4), which will then go to a long cooling block(5), then back to the reservoir in a closed loop.
Power will also go a parallel circuit consisting of four boost converters (6), each dedicated to its own COB LED (7). The COB LEDs are affixed to the cooling block (5) to keep temperature low and prevent thermal runaway.
When the system is working, I'll house it in a custom-built case- though I'll probably allow for scalability and modification in the future, in case I want to swap LEDs... or add even more! 
At the moment, I'm thinking of using CXB3070s, as they are fairly low cost ($18.20 for the CXB3070-0000-000N0HBB50G model). If you have other recommendations for 100w COB LEDs that can provide high output, please let me know.
I'm also curious as to whether I'll have an easier time using 11.1v batteries in parallel to get a longer runtime, or sourcing a high capacity battery. I'd welcome suggestions for this!
I would like to humbly request general feedback for the first draft of my design. Do take note, though, that this is my first time really delving into the world of flashlight-making. Definitely let me know if there are any glaring errors or safety concerns! If there's a way to simplify or improve the design, I would love to hear it. Finally, if you have questions about the symbols or details of my diagram, please let me know.
Thank you!
