Someone recently described a 500w PIR flood light as "fixing a half bar electric fire outside".
Which has got me thinking. Especially given the unreliability of 500w halogen lamps/lights.
So, given the choice between a 500w PIR halogen & an 11w CFL dawn dusk light - which will be cheaper to run?
Obviously an 11w CFL dawn/dusk will be on for a much longer period, but is low energy, won't be triggered randomly & will have a longer service life PIR lights being a PITA IMO (sorry Rob)!
On the other hand a 500w halogen PIR in theory will be on for much shorter periods, but will consume much more power.
Again in theory an 11w CFL could be on for 45 times as long for the same energy.
So which one is the best deal for the customer?