yes the lumecubes will keep functioning after it loses bluetooth (which is about 30ft), and obviously you will not have any control, they will stay in the last mode you set them on. The strobe mode is pretty cool, they can be set for 1/2 sec all the way to 10 flashes per second. They also work great for regaining your bearings when flying in daylight, 1500 lumens is quite bright and can be seen from quite a distance. Got mine the other day, they are pretty cool, the app however is iffy at times and can be irritating, shutting them off and reconnecting seems to correct the issues.