LED Retrofit Corn Bulb | 27W to 125W on E26 and E39 Bases
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| Wattage | 27W to 125W depending on version |
|---|---|
| Base | E26 medium or E39 mogul |
| Colour temperature | 5000K |
| Voltage | 100 to 277V |
- Match the wattage to the old lamp - 27W for a 70W to 100W metal halide, 36W for 100W to 150W, 54W for 150W to 175W, 80W for 175W to 250W, 100W for 250W to 320W, 125W for 320W to 400W.
- Check the socket size - E26 is the standard medium screw, E39 the larger mogul. An E39 lamp will not go into an E26 holder, and an adapter adds a failure point at the connection carrying all the current.
- Bypass the ballast - a ballast built for metal halide will damage an LED lamp. This is mains wiring.
- Measure the housing - a corn lamp is longer and wider than the lamp it replaces. In a shallow wall pack or a small lantern it may not let the fixture close.
- Fit one before ordering the rest - the old reflector and lens have usually lost efficiency, so the ratio is never exact.
- Have a licensed electrician do the bypass, and never fit a bypassed lamp into a fixture with a live ballast.
The smaller end of the retrofit range
Not every fixture being retrofitted held a 400W metal halide. Wall packs, small area lights, garage fixtures and post lanterns often ran 70W to 250W lamps, and putting a 200W corn lamp into one of those wastes money and overlights the space.
This series runs 27W to 125W on an E26 or E39 base, which covers the lower half of most retrofit jobs.
What each wattage replaces
| Corn lamp | Replaces | Typical fixture |
|---|---|---|
| 27W | 70W – 100W metal halide | Wall pack, stairwell, small canopy |
| 36W | 100W – 150W | Garage bay, small area light |
| 54W | 150W – 175W | Post lantern, covered walkway |
| 80W | 175W – 250W | Low bay, larger wall pack |
| 100W | 250W – 320W | Shoebox, small high bay |
| 125W | 320W – 400W | High bay, car park fixture |
E26 or E39
The lower wattages come in both. E26 is the standard medium screw found in domestic and light commercial fixtures. E39 is the larger mogul base used on industrial gear. Look at the socket before ordering — an E39 lamp will not go into an E26 holder, and an adapter adds a failure point at the one connection carrying all the current.
Bypass the ballast
The existing ballast normally has to come out, with the lamp wired direct to the supply. A ballast built for metal halide will damage an LED lamp. This is mains wiring and belongs with a licensed electrician.
Measure the housing
A corn lamp is longer and wider than the lamp it replaces. In a shallow wall pack or a small lantern it may not let the fixture close. Open one and measure before ordering for a site.
Related
For higher output see our 80W to 300W corn lamps. For sideways sockets, see the horizontal corn lamp.
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