CRLight Dimmable LED Edison Bulb 4W 2700K Warm White, 400LM 40W Incandescent Equivalent Vintage ST64 / ST21 LED Filament Bulbs, E26 Medium Base Clear Glass, Pack of 6 TECHNICAL FEATURES - Using high efficiency and large-size LED chips in filaments, full brightness is 400 lumens, AC 110V-130V, with overload protection, short circuit protection and over temperature protection RETRO LOOKING LED BULBS - Vintage Edison style, 2700K warm white glow, produces warm, comfortable and intimate atmosphere, 360 degrees beam angle, nearly identical in color to incandescent bulbs DIMMABLE - Being able to adjust the light brightness means youre able to create the perfect atmosphere in your room anytime. To achieve ideal and smooth dimming effects, we recommend Lutron and Leviton dimmers (Lutron DVCL-153P, Lutron DVELV-300P, Lutron MACL-153M, Lutron TGCL-153PH, Leviton 6672-1LW) ENERGY SAVING & ECO-FRIENDLY - 40W incandescent replacement, save over 90% on electricity bill of lighting. Ultra-thin crystal, clear glass with high transmittance, mercury-free, no UV, CE and RoHS authenticate EXTREMELY LONG LIFE - Average 30000 hours lifespan, 16 years life (5 hours per day), 2 years warranty