The Satco non-dimmable 16 watt 12" diameter 4000K T9 Circline LED bulb generates as much light as a 32 watt T9 Circline fluorescent bulb. 4-pin base, ANSI base G10q. No ballast or external driver needed.
The ballast must be bypassed when present.
No lead or mercury means easy and environmentally safe disposal
Saves 16 watts compared to a 32 watt fluorescent bulb
Very long life - Rated to still put out 70% as much light after 50,000 hours as it did when brand new.
Not recommended for use in enclosed fixtures because heat build up will shorten life. Do not "hot swap" this bulb. Turn off fixture before replacing bulb.