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Blue Spectrum 6400K CFL Bulb From Power Plant Lighting Systems. The Blue Spectrum (6400K) Enviro Grow Compact Fluorescent Light has a 4U design and high output par lumens that ensure good growth. They have an estimated life span of 10000 hours. The blue spectrum (6400K) bulb is best for propagation and general vegetative growth.
- 15W
- 18W
- 23W
- 30W
- 36W
- 65W
- 85W
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