My first attempt at external lights worked fine, but it was large and difficult to mount. So I designed and 3D printed some new lights, that look like this:
Like the last lights, I then filled them with epoxy to waterproof the electronics, but left the very top of the LEDs exposed. If someone has tried this before and thinks that is a bad idea, let me know. I could have sunk them in the epoxy, but I thought light transmission and heat dispersion would work better this way.
I printed out a bar with two mounting points and hot glued it to the top of the ROV. So the whole fixture looks like this:
Initial testing in a dark room is promising. There does not seem to be any of the internal reflections that the lights inside the tube give. We do not get as much light pointing down, however. Maybe I should have put one light below and one above? Thoughts?
Anyway, so far so good. Now I just need to see how it works in dark water…