If I considered only the lamps performance when installed I would have given a 5* however there are is something about the lamp that I believe is a design fault that should be corrected. The on/auto and off switch is extremely fragile and mine broke on first use, fortunately it could be moved to the auto position with pliers and I only need the auto setting. However the lamp performed very well. It has an excellent PIR range and the lamp, when installed next to the front door and slightly above the keyhole illuminated the door threshold, step and keyhole excellently.