Mansa Lighting, 2 Pack, 4 Watts, 400 Lumens, COB Filament, C35 Candle Style Bulb, E12 (Candle/Candelabra) Base, Warm White, Dimmable, 40W Equivalent 2 Pack, 4 Watts, C35 Candle Style Bulb, E12 (Candle/Candelabra) Base, Warm White, 400 Lumens, Dimmable A COB LED filament looks like a traditional light bulb and puts out 360 degrees of light. This bulb is not compatible with X10 Home Automation Systems. Not for use in completely enclosed fixtures. Dimming test performance - across our range of test dimmers stable light at 10%-100%. On older dimmers if a circuit has more than 24 bulbs as the load, some flickering emerged at full power. Dimmer performance is variable depending on your dimming switch, no hassle returns for dimmer problems.