SATCO Lighting S21270 4W B11 LED, Frost, Candelabra Base, 90 CRI, 3000K, 120V

It can. The S21270 is an enclosed rated lamp, so sealed sconces, flush-mount glass fixtures and lantern housings are all fair game. It's also wet location rated and listed for indoor or outdoor use, which covers exterior porch lanterns and covered entries exposed to weather. Burning position is universal, so base-up, base-down or horizontal all work.

3000K is a warm white, close to the tone of a soft white incandescent rather than the yellower 2700K or the neutral 3500K. The 90 CRI rating means color rendering is high enough for guest rooms, dining areas and retail displays where skin tones and finishes need to read accurately. The frosted glass diffuses the LED filament so the lamp doesn't show hot spots through a clear shade.

Close to it. Beam spread is 300 degrees, so light goes out sideways and upward much like a filament candle lamp, which is what you want in an open chandelier or a wall sconce with an exposed socket. It's not a directional lamp, so it is not the right choice where you need a controlled downward beam.

Yes, the S21270 is Title 24 compliant, which matters on California residential and multi-family work where fixtures need compliant lamps. It is also FCC compliant. Note it is not DLC listed, so if a utility rebate program requires DLC qualification, this lamp won't satisfy that requirement.

Average rated life on the S21270 is 15,000 hours. For a lobby or stairwell chandelier running roughly 12 hours a day, that is on the order of three years between relamps, which is the main argument for swapping out 40W incandescent candelabra lamps in hard-to-reach fixtures.

No. It is not a three-way lamp, so in a three-way socket it will operate at a single light level rather than stepping through settings. For standard single-circuit candelabra sockets, including dimmer-controlled ones, it works normally.

Glass envelope with a nickel plated aluminum base. It's a glass lamp, which is why the frost diffusion looks like a traditional candle bulb rather than a molded plastic one. Each lamp weighs 0.035 lb.