You have to be able to see your UAV/UAS/Drone to fly under FAA VFR line of sight Regulations. This limits your range to a couple of hundred yards depending on your eyesight , daylight conditions, and background.interference. Its also good for others to see it also for their safety and your liability issues.
I want to introduce our brilliant omnidirectional LED search and rescue signal devices that are highly visible in all conditions and over 5 miles at night.
For UAV/UAS/Drones, we mounted the LED Board and driver in an anodized aluminum fixture with a polycarbonate dome. Two wires exit the bottom and runs on 4.5 to 9 VDC. They have a very low current draw and the entire unit weighs around 8 grams. We believe It is the brightest, lightest, energy efficient omni directional multiple LED strobe on the market.