SATCO Lighting S11331 20W, A21 LED, 4000K, Medium Base, 220 degree Beam Angle, 120-277V

No. The S11331 is a non-dimmable lamp. Put it on a dimmer circuit and you can expect flicker, buzz, or premature failure of the lamp or the dimmer. If the fixture is on a dimmer and you want to keep the dimmer, you need a lamp specified as dimmable instead. On a plain on/off switch it's fine.

Yes on both. The S11331 runs on 120V through 277V at 60Hz, drawing 0.167A at the low end of the range and 0.072A at the high end. That's why it suits mixed portfolios: the same lamp goes into an apartment fixture on 120V and a 277V corridor or stairwell fixture in a commercial building, so you stock one part number instead of two.

Yes. The S11331 is an enclosed rated lamp, so it's cleared for closed-globe ceiling fixtures, jelly jars, and drum shades where heat builds up. That matters because a non-enclosed-rated LED in a sealed fixture cooks its own driver and fails early. Burning position is universal, so base up, base down, or horizontal all work.

Damp location only. That covers bathrooms, covered exterior entries, soffits, and similar spots that see humidity or condensation but no direct water. It is not a wet location lamp, so keep it out of open weather, direct rain, or anywhere it takes a hose. For an unprotected exterior fixture you want a wet location rated lamp.

4000K is neutral white, the usual pick for corridors, stairwells, laundry rooms, back-of-house, and work areas where you want clean, alert light rather than a warm residential glow. The S11331 is fixed at 4000K, not color-selectable, so what you order is what you get. If you're relamping guest rooms or apartment living spaces where the existing bulbs are warm, 4000K will read noticeably cooler and you'd be better off with a warmer lamp so the building stays consistent.

220 degree beam angle, which is wider than a hemisphere, so light comes off the sides of the lamp as well as the end. That's what you want in a bare socket, a table lamp, or an open globe where the bulb has to fill the room. It's the wrong tool for aimed, directional light on a display or a work surface, where a reflector lamp is the better answer. The white lens diffuses the output rather than throwing a hard spot.

CRI is 90+, which is the tier specified where color accuracy is judged: retail merchandise, patient rooms and exam areas, hotel lobbies, and anywhere finishes and skin tones have to look right. Most commodity LED lamps sit around 80 CRI. Paired with 2000 lumens at 4000K, this is a general service lamp that can go into spec-driven spaces rather than just back-of-house.

Not as a three-way lamp. The S11331 is not a three-way bulb, so in a three-way socket it will run at one output level rather than stepping through low, medium, and high. It will still light, but the switch positions won't do anything useful. For a three-way table lamp, order a lamp specified three-way.

No. The S11331 is not DLC approved, so it won't qualify under utility programs that require a DesignLights Consortium listing. If a rebate is part of how a retrofit is being funded, that has to be confirmed against a DLC listed lamp before the order goes in.

Average rated life is 25,000 hours. On a 12-hour-a-day corridor or common area schedule that's roughly 5.7 years of service before a planned relamp. For property managers doing group relamping across a fleet of fixtures, that's the number to schedule against.

Housing and lens are both white, with a plastic (PS) lens over the LED. The base assembly is metal, plastic, and electronic components, which is the standard construction for a driver-on-board LED lamp. Nothing on it is glass, so it handles handling on a cart or ladder better than an incandescent A21.

Yes, the S11331 is lawful for sale in California. That matters on lamps because California enforces its own state lamp efficacy rules separately from federal ones, and some LED lamps sold nationally cannot be shipped there.

The S11331 is FCC compliant, so its electronic driver meets the federal limits on radio frequency emissions. That's the check worth making in offices, healthcare spaces, and anywhere near sensitive electronics, since cheap LED drivers are a known source of RF noise on AM radio and other equipment.