E39 is the mogul screw base. In a home it turns up on some torchiere floor lamps that take a 3-way mogul bulb, and on big garage and yard lights, where Feit’s corn-cob LEDs fit with a mogul adapter.
What it looks like
It screws in like a household bulb, on a much bigger base. Philips’ base chart lists Mogul and Mogul Three Contact bases.
Torchiere 3-way lamps
Satco makes its LED 3-way mogul lamp for torchiere-style lamps, in place of 100/200/300 watt 3-way bulbs. Its S11490 uses 10, 22 and 34 watts, runs on 120 volts, is rated for damp locations, and is 7.09" long and 3.11" across. How the three levels work is on 3-way bulbs.
The DOE’s rule says a torchiere made on or after January 1, 2006 must use no more than 190 watts and must not be able to run lamps totalling more than 190 watts. Check the lamp’s own label for its limit.
Garage, barn and yard lights
Feit sells its corn-cob LEDs on an E26 base with an E39 adapter in the box, for mogul sockets in fixtures without a ballast. It describes them for large rooms, garages, barns and yards.
| Watts | Lumens | Length | Enclosed |
|---|---|---|---|
| 45 W | 7,000 | 7" | No |
| 80 W | 10,000 | 8.8" | Yes |
| 45 W, dusk to dawn or motion | 5,000 | 7.1" | No |
In order: Feit C7000/5K/LED/V1/HDRP, C10000/5K/LEDG3/HDRP and C5000/5KDDMM/LEDHDRP, listed 3.3, 3.8 and 3.2 inches wide. All three are rated for damp locations, aren’t dimmable, and are listed for 120 to 277 volts.
Check the length and width against the fixture’s globe or housing, and pick an enclosed-rated one if the fixture closes around the bulb.
Feit says a fixture that ran a high-pressure sodium, mercury vapor or metal halide lamp needs its ballast bypassed first. That means rewiring the fixture, so turn the power off at the breaker and have an electrician do it.
What it’s confused with
- E26. The standard household base, far smaller. Feit’s corn cobs have an E26 base and reach a mogul socket through the adapter packed with them. See base types.
- EX39. The extended mogul base, which Westinghouse lists apart from E39 on its high bay LED.
- HID lamps. Feit tags its metal halide mogul lamps for commercial lighting.
Another base?
Bases and shapes