Dimmable: R7S 78mm LED dimmable is compatible with most TRIAC dimmers, such as GIRA, Kopp, Busch, Legrand, ATIA, Varibright, etc. Not compatible with electronic dimmers. Not suitable for use in fully enclosed luminaire. R7S 1500LM: R7S LED 78mm 15w dimmable, neutral white light color 4000k with 360 degree light diffusion angle, uniform light diffusion. The brightness of 1500 lumens is ideal for the living room ceiling light. Energy saving: R7S 78mm LED 15w is an ideal replacement for R7S J78 120W-150W halogen pencil bulb. Reduce energy consumption by more than 85%. Low maintenance costs. Used to replace the halogen bulb in the floor lamp. Durable Quality: Size (31*31*78mm), easy to install. With a lifespan of 25,000 hours. The ceramic lamp body is resistant to high temperatures and is safer than incandescent bulb. No flickering. No fan noise. Applications: R7S LED 78mm dimmable is ideal for kitchen, living room, basement, garage, office, studio, warehouse workshop, yard, construction site, garden, etc. Used for floor lamp, ceiling light, construction light, etc.