Full spectrum light bulb that imitates daylight, energy star compliant, long life at circa 10,000 hours; low energy consumption, good for treating Seasonal Affective Disorder S.A.D., for photo studio lights, or for starting plant growth. This is a Compact Fluorescent Light (CFL) bulb. Fits all medium-base E27/E26 sockets, but this is a large bulb that might create a fit problem with standard lamp harps of household light fixtures; a larger lamp harp is needed, see ALZO 9" harp, ASIN B0035LTIZE. Dimensions: L: 6.5"; W (Diameter): 2 1/4"; Length socket base to top of ballast: 2 3/4"; W (diameter) of socket: 1".Price:
45W Full spectrum light bulb for daylight balanced lighting, energy star compliant, long-lasting at cir. 10,000 hours with 2800 Lumens output; low energy consumption, good for treating S.A.D. (Seasonal Affective Disorder), photo studio lights, or starting plant growth. This is a Compact Fluorescent Light (CFL) bulb. Fits all medium-base E27/E26 sockets, but this is a large bulb that might create a fit problem with standard lamp harps of household light fixtures; a larger lamp harp is needed, see ALZO 10" harp, ASIN B003SZCUZ2. Dimensions: L: 7"; W (Diameter): 3"; Length socket base to top of ballast: 3"; W (diameter) of socket: 1".