I need to plug in one of those USB plugs that has 5V output with 1.5A rating to operate a WiFi ceiling mounted PTZ camera. The only power source is above in the loft and it's a lighting circuit. I know running a socket of the lighting circuit is a no-no because of the limited load it can cope with. But seeing as what I am using it for is a single USB charger and if I label it will this be ok? I could also put a fuse socket with a 1A fuse maybe but wondering if 1A will blow considering the USB charger says 5V 1.5A