SATCO Lighting S18400 4.5W LED PL 2-PIN, 2700K, 450 Lumens, G23 Base, 360 degree Beam Angle, Type B, Ballast Bypass

The S18400 is a Type B ballast bypass lamp, so the existing CFL ballast has to come out and the sockets get wired directly to line voltage. Drop it into a fixture with the ballast still in place and it will not run correctly. It accepts 120V to 277V at 50/60Hz, so the same lamp works on residential 120V and commercial 277V circuits once the bypass wiring is done.

Yes on both counts. The S18400 is an enclosed rated lamp, so a sealed or gasketed fixture is fine, and it carries a damp location rating, which covers bathrooms, covered porches and similar damp spots. It is not rated for wet locations with direct water exposure.

No. It is a non-dimming lamp. Put it on a dimmer circuit and you can expect flicker, buzz or premature failure. If the fixture is on a dimmer, either replace the dimmer with a standard switch or pick a lamp specified as dimmable. It is also not a three-way lamp and the color temperature is fixed, not CCT selectable.

It replaces a 40 watt incandescent, putting out 450 lumens on 4.5 watts. Current draw runs 0.038A down to 0.016A depending on whether you are on 120V or 277V, which is what lets a long run of these sit on one circuit without tripping.

At 2700K it is the warm white end of the range, the same nominal color as a standard soft white incandescent or a 2700K CFL. Color rendering is 80 CRI. If the other fixtures in the space are 3000K or 3500K, this lamp will read visibly yellower next to them, so standardize a floor or a corridor at a time.

Burning position is universal, so base up, base down or horizontal all work. The beam spread is a full 360 degrees with a frosted plastic lens, so it throws light all the way around rather than in one direction, which is what you want in a sconce, a stairwell fixture or an open downlight where the old twin-tube CFL was.

It is not DLC approved, so it will not qualify under a utility program that requires a DesignLights Consortium listing. It is FCC compliant and lawful for sale in California. If a rebate is driving the job, verify the program's qualified products list before you commit to a lamp.

Average rated life is 50,000 hours. For a property manager running stairwell or corridor fixtures close to around the clock, that is the argument for doing the ballast bypass once instead of changing twin-tube CFLs on a cycle. The housing is white and the lamp is a standard PL shape, so it looks the same in an open fixture.