eSenLite innovated dimmable (0 Lumens to 4200 Lumens) and color selectable (3000K to 5000K, factory default: 4000K), 1 ft. x 4 ft. flat ultra-thin standard 40-Watt LED ceiling troffer panel light provides exceptional performance and market leading quality while saving energy. Designed with maintenance free Integrated 3rd generation LED illuminators ensure up to 80,000-hours life cycles. Unique light fixture structure, side view emitting, high transmittance LGP, illumination uniformity and soft light can relieve eye fatigue, shadow free. Easily for most commercial installation as new lighting project or can replace your existing old-dated 1 ft. x 4 ft. fluorescent troffer. Lighting brightness and LED color can be easily adjusted by optional hand hold wireless 2.4 GHz remote and/or wall mount controller as well compatible with 0-Volt to 10-Volt standard dimmer. Applications include offices, conference/meeting rooms, classrooms, show rooms, working shop/studio and so on, unlimited.