Satco S8145 4100K 54-Watt Mini Bi Pin T5 HO High Performance Lamp, Cool White Manufacturer: sitcom products Manufacturer part Number: S8145 Saco linear Fluorescent lamp, T5, high output, 4100K, 85 CRI, mini begin, 48 in., 54 Watts, 40 per case - 2489284 20000 Average rated hours 54-Watt mini bi pin 4100K cool white