Light Bulb,Blue Spc Hydrp LED Ultra,PK4, Bulb Beam Angle 180 Degrees , Bulb Shape A21, Light Technology LED, Incandescent Wattage Equivalency 150 W, Plant Growth Application Germination, Seeding & Starting, Spectrum Blue, Full/Broad, Shatter-Resistant Yes, Bulb Housing Plastic, Peak Wavelength 450 nm, Bulb Manufacturers Warranty Length 1 yr, For Enclosed Fixtures Yes, Bulb Finish Frosted, Bulb Minimum Starting Temperature -4 Degrees F, Bulb Power Source Plug and Play, Bulb UL Type Not Applicable