This full spectrum light bulb creates daylight balanced lighting, is energy star compliant, and has a long life of cir. 10,000 hours with 4250 Lumens output; low energy consumption, used in light therapy for treating S.A.D. (Seasonal Affective Disorder), for photo studio lights, or for starting plant growth. This is a Compact Fluorescent Light (CFL) bulb. Fits all medium-base E27/E26 sockets. Dimensions: L: 10.5"; W (Diameter): 3.9"; Length socket base to top of ballast: 4.5"; W (diameter) of socket: 1".
CFL bulb has natural daylight balanced color temperature of 5500K
Ideal for treatment of S.A.D. - Winter Blues
This is a large bulb that might not fit standard household lamps - see diagram above