SWITCH Lighting A2100CUS40A2-R Classic A21 LED Light Bulb with 100-Watt Replacement and Clear Lens, Neutral White (4000K) Stunning visual design that looks as good off as it does on, all within the standard A-form factor Liquid cooling that is up to 40% more efficient than standard air-cooled lamps Instant on, operates in any orientation and with a wide variety of fixtures, including recessed and fully enclosed applications Industry Leading Lifetime Warranty Can be used with a wide variety of dimmers