SATCO Lighting S21287 4W B11 LED, Frost, Medium Base, 90 CRI, 2700K, 120V

Yes on both counts. The lamp is enclosed rated, so a closed globe, jar, or lantern housing is fine, and it carries a wet location rating for indoor or outdoor use. That covers covered porch fixtures, post lanterns, and coach lights exposed to weather.

It replaces a 40 watt incandescent, putting out 350 lumens at 4 watts. Color is 2700K, the same warm white tone as the incandescent it is swapping out, so a partial changeover across a fixture or a hallway will not look mismatched.

It is a dimmable lamp on 120V, 60Hz line voltage. Older dimmers built for incandescent loads often need a minimum wattage to run smoothly, and at 4 watts per lamp a single bulb on a legacy dimmer can flicker or drop out at the low end. On a multi-lamp fixture or an LED-rated dimmer it behaves normally.

Yes, the S21287 is Title 24 compliant, which is what matters if you are specifying lamps for residential work in California. It is also FCC compliant. It is not DLC listed, so if a commercial utility rebate program requires DLC, this lamp will not qualify for it.

Burning position is universal, so base-up, base-down, or horizontal all work. That matters on wall sconces and ceiling fan kits where the socket is not vertical. The 300 degree beam spread means light goes nearly all the way around the lamp rather than throwing in one direction.

This Satco lamp is 90 CRI, which renders skin tones, wood, and fabric noticeably closer to how they look under incandescent. For hotel guest rooms, restaurant dining areas, and retail display, that difference is visible to the customer. For back-of-house corridors and storage, standard-CRI lamps do the job and 90 CRI is money you do not need to spend.

Each lamp draws 0.033 amps at 120 volts, so lamp load is effectively negligible on a branch circuit. The practical limit becomes the fixture count and the dimmer or driver on the circuit, not the amperage of the lamps.

Average rated life is 15,000 hours. At roughly 12 hours a day that is about three and a half years before you expect relamping, which is the number to use when you are planning a maintenance cycle on high ceilings or hard-to-reach decorative fixtures.

The S21287 uses LED filament construction but with a frost finish, so the filaments are softened rather than exposed. Body is glass with a nickel plated aluminum base. Pick this one where the bulb is visible in an open chandelier and you want glare knocked down instead of a bare filament look.

No. It is not a three-way lamp, so in a three-way socket it will operate at a single output level on one of the switch positions rather than stepping through low, medium, and high. For that fixture you need a lamp specifically built as three-way.