
I was skeptical it would detect movement through a frosted sphere but it works great. The light goes out when there is no movement and lights up when it senses movement. I just installed one of these so I can't say how long they will last. The price is very good too, they are a fraction of the price I would normally pay for motion sensor light bulbs. Cons: not dimmable, not programmable, doesn't walk on water, etc.