SATCO Lighting S16500 LED Circline, 11W, T9, 3000K, G10Q Base, 120-277V, Type B, Ballast Bypass

Yes. The S16500 is a Type B ballast bypass lamp, so the existing magnetic or electronic ballast has to be removed and the G10q socket wired directly to line voltage. It runs on 120V to 277V at 50/60Hz, so it works on both residential and commercial circuits once the fixture is rewired. If you want a lamp that drops into the existing ballast with no rewiring, a Type B lamp is the wrong choice.

It uses a G10q 4-pin base, which is the standard circline socket, and the lamp is a T9 circline shape. If your existing fluorescent circline has the 4-pin G10q connector, the base mates. The one thing that will stop the swap is the ballast: this lamp requires direct line voltage, not ballast output.

No. The S16500 is not dimmable and it is not a three-way lamp. On a dimmer it will flicker, buzz, or fail early. Wire it to a standard on/off switch only.

Both are fine. It is an enclosed rated lamp, so a closed drum or pan ceiling fixture will not void it on heat, and it carries a damp location rating, which covers a bathroom or a covered porch. Damp is not wet, so it should not be used where it takes direct water.

The 11 watt LED circline puts out 1100 lumens, which Satco rates as a 50 watt incandescent equivalent. The 3000K color is a warm white, noticeably warmer than the 4100K cool white a lot of older fluorescent circlines used, so if you are relamping only some fixtures in a room the color will not match the remaining fluorescents.

It is not DLC listed, so it will not qualify for rebate programs or commercial specs that require a DLC entry. It is Title 24 compliant and FCC compliant, which covers California energy code work and RF emissions.

Draw is 0.092A at the low end of the voltage range down to 0.040A at the high end, at 11 watts. That is what to use when you are totaling a corridor or stairwell circuit after relamping, and it is a fraction of the fluorescent-plus-ballast load it replaces.

The rated life is 50,000 hours, against the few thousand typical of a fluorescent circline plus a ballast that also fails. The catch for a fleet relamp is labor: every fixture needs the ballast removed and the socket rewired to line voltage, so it is a one-time electrician visit per fixture, not a bulb swap. Fixed at 3000K with no selectable color, so order the whole building on one color if you want them to match.

No. Burning position is universal, so it can be run base up, base down, or horizontal in a ceiling pan, wall sconce, or under-cabinet circline fixture without affecting rated life.

It has a frosted lens and a 135 degree beam spread, so light is diffused rather than thrown in a tight cone. That is close to how a fluorescent circline behaves in a ceiling pan. At 80 CRI, color rendering is adequate for corridors, laundry, storage, and general residential use, but a retail or task area wanting accurate color usually calls for 90 CRI or better.