A substitute for a conventional incandescent light bulb includes a CFL with a specially equipped base structure disposed between the male connector and the coiled fluorescent tube. The modified base includes an active vapor dispenser and, preferably, a heater for increasing and/or controlling the rate...http://www.google.co.uk/patents/US7618151?utm_source=gb-gplus-sharePatent US7618151 - Combination compact flourescent light with active ingredient emission
