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Old 12-05-2011, 10:34 AM   #1
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Maximum bulb wattage


I have a detached garage with 6 leviton 660w/250v white ceramic bulb fixtures fed by 12 ga wire from a 20amp breaker through 2 switches ( 3 fixtures per switch). Currently have a 65w flood in each. What is the max wattage bulb I can install in these fixtures for more light? Walls are OSB and ceiling is tan vinyl so its kinda dim. Have 3 4ft 2 bulb tubes on 3 walls but looking for an easy screw-in enhancement. What about round reflectors for each fixture? Thanks

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Old 12-05-2011, 10:41 AM   #2
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Maximum bulb wattage


you could put 23w cfl flood type, these are equivalent to 100w incandescent (not sure you can go over 75w, it should be marked inside fixture what is maximum wattage)

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Old 12-05-2011, 11:35 AM   #3
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Maximum bulb wattage


Based on this information, "leviton 660w/250v", you can put 660 watts in them. Don't exceed 1880 watts on the entire circuit or you will trip the breaker.
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Old 12-05-2011, 11:56 AM   #4
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Maximum bulb wattage


6 X 65 watts = 390 watts divide by 120 volts = 3.25 amps
Looks like you could put 200 watt bulbs in if you wanted.
660 watt maximum fixtures
20 amp max circuit
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Old 12-05-2011, 02:00 PM   #5
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Maximum bulb wattage


You should be able to run 200w bulbs in those fixtures, but that's a lot of juice. You could get the roughly same light output from eight four-foot fluorescent T8 tubes and use only about 20% of the energy required to power six 200W incandescent bulbs. Aside from the energy savings, you'll also replace bulbs far less often.

I use the T8 four footers in my shop and have no complaints. They do take a minute or so to warm up if it is cold in the shop, but I don't find it to be problematic.
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Old 12-05-2011, 03:18 PM   #6
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Maximum bulb wattage


Get the highest wattage cfl bulb you can get. 100 watts get kinda expensive and would probably be overkill anyway
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Old 12-05-2011, 04:37 PM   #7
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Maximum bulb wattage


400W per fixture would be the maximum load for the circuit. But that's crazy. Better scale it back to only 300W bulbs, since that's the largest standard light bulb you can find at the hardware store :-)

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