- Will this fit my round ceiling light?
- It is a 16-inch T9 circline tube, so it fits fixtures built for that size and pin configuration. Check the old tube's diameter and connector before ordering.
- Does it need a ballast?
- Yes. It is a fluorescent lamp and runs only on a compatible circline ballast. It will not work wired directly to mains.
- Is 4100K warm or cool?
- 4100K is cool white, a neutral tone slightly cooler than typical warm white household bulbs. It reads clean and bright rather than cozy.
- Can I replace a fluorescent circline with LED?
- Yes, LED circline retrofits exist and use less power. Some need the ballast bypassed, so match the retrofit to your fixture.
- How should I dispose of it?
- Fluorescent tubes contain a small amount of mercury. Take it to a household hazardous waste or bulb recycling point rather than household trash.
- Where is the Philips 40-Watt 16 in. Linear Circline T9 Fluorescent Tube Light Bulb Cool White (4100K) (1-Pack) cheapest?
- At Cardinal Warehouse, for $17.41, as of our latest check.