FAA RULE 107 for Night Flights :  When sUAS operations are conducted during civil twilight, the sUAS must be  equipped with anti-collision strobe lights (this is NOT the lights already on your drone) that are capable of being visible 360 degrees for at  least 3 statute miles. However, the remote PIC may reduce the intensity of the  lighting if he or she has determined that it would be in the interest of  operational safety to do so. For example, the remote PIC may momentarily reduce  the lighting intensity if it impacts his or her night vision.  Plus it also help you locate a lost drone as it has its own power source so wont stop flashing even if the aircraft power has been interrupted.!  For those seeking night waivers under FAA 107 or wanting to fly in civil twilight , Strobe lighting is required and lighting is a "performance based standard:" When seeking waiver and filling out online request via the FAA you DO NOT need to comply with FAA Part 25 and document lumens ect, you will need to document how you will meet the requirement and this Cree strobe will meet that requirement placed on top of the aircraft and depending on the aircraft we suggest the bottom also for 360 degree coverage.  The info for FAA 107 is at bottom of this add or check the FAA website.