I have purchased the leds for the lights on the boat. They are 3mm (superbright type) with coloured caps as the leds are "water clear" making them look more like lights than leds. They were very expensive (for leds) but they look right for the boat. I have also purchased the wiring for the boat. I chose white and grey colours for + and - as they are easier to hide than red and black (for instance).