I was wanting some more lights, mostly so people can see me, not so much so I can see them. In the past I made some LED lights from scratch using ABS pipe for the housing, etched my own circuit, etc. I was thinking about redesigning that setup using SMD components, but while I was browsing eBay, I stumbled across these I got a pair for $18. They are 12V 10W waterproof spotlights made for fountains and pools. I was leery of how wide the beam would be, but decided to take a chance.
We'll, they're bright, and at 10W each running ~14V, they'll pull under 2 (~1.4A) amps.
I didn't want to use the bracket that came with them and I wanted to mount them on the fork lowers for a "triangulation" of light, so I mocked up a new mount with some of the leftover computer case I had laying around. It's pretty thin so it's easy to work with. This was more a "proof of concept" because this stuff is definitely too thin to last very long.
Got one mount made just to see how it looks. While this may be sufficient, I'm going to make some new mounts using some heavier sheet.
One LED only. No headlight. Just thrown on there, not aimed properly.
Low beam and one LED.
They're pretty simple. All aluminum housing acts as a heat sink. The LED chip is thermal pasted and screwed to the housing. The lens has a silicone sleeve to seal it up. The back case is sealed via silicone washer. Inside you'll find the constant current LED driver, which I've found will handle switching the polarity for you, so even if you hook the thing up backwards, it works. The driver is suspended/supported via the wires. If it were to fail, I'd imagine this is where you may end up with a loose or broken solder connection to the driver board. I've also seen some reflectors that can be purchased to go between the LED and lens to focus the light more. I'll get these on the road and see how they do before I worry about that.
You can find them all over eBay. I went with this because it shipped from the USA and had the "bubble" lens, which I'm thinking will focus the light more. You can get them with a flat lens and in the RGB flavor (red-green-blue) that comes with a remote so you can make them shine any color under the sun.