Keymit 4W LED Candelabra Bulb Dimmable 6Pack E12 Base, 4W, 400lm,2700K,CRI&gt;80,UL-Listed E492997,40W Equivalent New Deep Dimmable Solution(NDDS) makes Chandelier bulbs compatible with more than 90% types of dimmers Designed for indoor or outdoor and enclosed fixtures If for whatever reason you are not 100% satisfied please contact us directly Base (Itll cause short circuit and rust) Driver (Itll result in Non-Dimmable, Done, Strobing and more) Glass Mount Filament (Itll lead to different Lumen CRI stability Kelvin Energy Heat and more) Outline of Glass Bulb Manufacturing Process (How to make sure every detail for bulb does work well) Nickel Plated Brass Base not Nickel Plated Iron 24 - 47 LEDs High-Performance Epistar Chip LED Filament Safe Linear LED driver Base Board with Pottery Line We pay extra fee for Outline of Glass Bulb and Glass Mount with 100% Manual Check Manufacturing Process (holding at least 300,000 Switching Cycles and last for 30,000 hours)