Step 6: Glue the LED's
1) do not get any glue on the LED lens. some glues (like silicone) you can get off the lens after it dries.
2) make sure the glue can handle 80-100 degrees celcius. (don't use hot-melt glue!). make sure it is waterproof (don't use superglue / cyanoacrylate)
3) i used silicone, but if i do it again i will try epoxy instead. the silicone does not flow by itself, so it is hard to get it to fully cover the LED (in order to have a submersible lamp). with epoxy you can dispense it with a syringe and accurately get it everywhere but the lens. smearing the silicone around is messy.
4) after pouring the glue, press the lens holders into place on top of the led's