I bought a one inch by one inch strobing LED that is USB chargeable and visible as far as i can take my MINI. I Installed it wit 3mm Velcro tape for easy install and uninstall for flight and packing up. It makes it easier to see where the drone is in the sky, and also makes for a really cool affect at night. as a side note, i took the drone out to the coast away from city light and flew it in complete darkness. The powerful led lights up the ground making for easy recognition of distance and relative height without looking down at your screen and ruining your night vision.