What a joke! I am looking to replace the 'scary' light behind my house and thought I'd go green but to have to wait 10seconds for the light to get bright - seems to be a burglars dream cme true! Sorry eco warriors halogen for me at least bthe light is instant. Some eco lights stay on all ight with an ambient glow, really energy efficient, then fire up a halogen when triggered -why? Just get a 500w floodlight a burnb the retinas!