18W 2D 4Pin GR10Q LED Light Bulb Cool White 6000K Square Lamp Replace 21W 28W Gr
Ballast compatible incandescent bulb, incompatible led bulb. Ballast will cause the bulb flicker and even not work. [Square LED Bulb] This is 2d 4 Pin gr10q led bulb, warm white 3000k 190 190mm,Non-Dimmable.