From Manufacturer
These white Mounting Brackets for DJI Phantom 3 Quadcopter from Lume Cube enable you to quickly attach a pair of Lume Cube lights to your drone. Attach each mount to a Lume Cube light (not included) using the mount's 1/4"-20 screw; then snap the mount onto one of the drone legs. A thumbwheel on the mount can be used to angle the horizontal position of the light.
Note:
Not compatible with Phantom 3 Standard