Satco’s 60 watt T12 rapid start fluorescent double ended linear lamp with 80 CRI is for use with traditional recessed general fluorescent lighting fixtures. The frosted white bulb features a Recessed Double contact R17d base, a beam spread of 360 degrees and delivers exceptional illumination. With a temperature of 4100 Kelvins, this lamp provides 12,000 hours of cool white light. Sold as a 30-Pack