Our house has the front door recessed into a porch which means at night it's a struggle to find the keyhole to unlock the door. A light is called for but I cant decide the best way to control it - i find that a switch inside the front door (the most conventional answer) usually results in the light being off when you need it and left on unnecessarily for long periods.
My thought was to wire a light to a fused spur tucked put out of the way (ie not where a light switch would go) and have the light controlled by a PIR with a couple of minutes "on time" and a 'low light' sensor to stop it coming on during the day. I was going to mount the PIR up inside the porch overhang pointing straight down so that it wasnt set off by people walking past on the pavement, only by visitors reaching the porch.
Will a PIR work successfully like this (i've never fitted one)and where do i buy one at a reasonable price.
Also, does anyone have a smarter solution?(other than a torch on my keyring)?