Lights that won't damage your wallet too much and won't take too much battery power either:
These wing or rotor arm detail lights will give nice blue detail to airplane wings or multi-copter rotor arms. A good way to improve orientation when flying around the field in fading light.
Will connect directly to your LiPo balance connector (or the main connector of course), or can be connected with the help of the low cost Turnigy relay switch or the Pico switch radio controlled relay, to give on/off capability.
2) Three molded Headlights. Each lamp at 1.2W / 90 lumens each, so 270 lumens in total, to give good visibility at day-time or night-time.
Again easy connection direct to the battery, or can use the low cost Turnigy relay switch or the Pico switch radio controlled relay, to give on/off capability.
Note if connecting to the LiPo battery always use the outermost connections (as shown in the picture) so as not to unevenly drain the LiPo cells.
Please do come and see more detail at Bluelight Technologies