25 Pk 17 Watt T8 LED; 4Ft; 3000K; Medium Bi Pin base; 50000 Average rated hours; 2100 Lumens; Type B; Ballast Bypass; Single or Double Ended Wiring Bulb Base_G10q Its manufacturer

Its manufacturer

and some can easily convert to LED by purchasing LED replacement lamps sold separately (for those with the Clear glass)

direct light to a specific area

Part#: 21781

25 Pk 17 Watt T8 LED; 4Ft; 3000K; Medium Bi Pin base; 50000 Average rated hours; 2100 Lumens; Type B; Ballast Bypass; Single or Double Ended Wiring Bulb Base_G10q Its manufacturer17 watt T8 LED; Medium Bi Pin base; 50000 Average rated hours; 2100 Lumens Features All glass tube Approved for use with tube guards NSF Approved Beam Spread: 210 Operating Temp: 20C ( 4F) to a maximum of +45C (+113F) No ballast or external driver required Built in shock resistant circuit (not hot until both ends are installed)