LED Troffer Retrofit Kit, 2ft x 4ft, 41 Watt, 5330 Lumen, 5000 Kelvin, 0 10V Dimming, 120 277V Input, 82+ CRI, DLC, (7 years warranty, 70,000 hrs rated life) IRT 24H(44) 850 | Alphalite for 164.98 at Lightingandsupplies.com