Right, I got the first light today, and to my disgust in the instruction booklet it says, well all sorts of scary things, warning of exposure to ultraviolet radiation, and so on, and avoid direct exposure at distances shorter then 3.3 metres! Needles to say this renders the thing bloody useless! Although it could be 3.3m away from us at band practice I wanted to experiment with the settings at home, in my bedroom, where needless to say I intended to be closer than 3.3 metres to it. Nothing about this was mentioned in any of the videos on YT. I was going to use a pair of these to make some budget music videos in our practice room but with all the health and safety warnings and various precautions required it's not worth it. Thanks for your help but I won't be taking this idea any further.