I installed these and did a flight tonight. The crees are getting it done. I only flew 1,000' out so far but these are easily visible and I'm sure would do the trick at 2k' out, which is really the most I'd need. They have officially replaced my ds-30 strobe. The bird is much lighter as well. These pics are where I placed mine. One is on top of the polar pro light kit which takes care of top-up, and one is under my battery tray facing down. I have no problem seeing the bird with all those lights and no strobe gets in the video. Excellent.