Ultra Gold T-12, 4'bulbs, 2 pack

If it's time to replace conventional fluorescent bulbs, consider switching to these new high-performance bulbs. They produce a brilliant, full-spectrum light that duplicates an amazing 94% of the solar spectrum. Plants get the best light and intensity for naturally healthy growth. Bulbs burn for about 30, 000 hours For use with T-12 fixtures only47.5"L x 1.5" dia.