This is probably one of the most simplest strobe light you can get for your RC airplanes that is actually bright enough to see in daylight and small enough to fit into even the smaller planes.
It measures about 0.67inches X 0.9inches.
This was designed to operate straight off of the receiver. Be sure that your system is 5V. Simply plug the connector into one of the unused channel, or use a “Y”-adapter with the rudder channel.
Although, the power consumption is negligible compared to the main power system, I’d recommend using a separate 5V UBEC and battery.