Maximum Bulb Wattage - Electrical - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical


Thread Tools Display Modes
Old 12-05-2011, 09:34 AM   #1
Join Date: Apr 2010
Posts: 2
Rewards Points: 10

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


Jamech is offline   Reply With Quote
Old 12-05-2011, 09:41 AM   #2
Join Date: Oct 2011
Posts: 539
Rewards Points: 786

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)


carmusic is offline   Reply With Quote
Old 12-05-2011, 10:35 AM   #3
joed's Avatar
Join Date: Mar 2005
Location: Welland, Ontario
Posts: 13,459
Rewards Points: 13,718
Blog Entries: 11

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.
joed is offline   Reply With Quote
Old 12-05-2011, 10:56 AM   #4
Join Date: Nov 2011
Posts: 83
Rewards Points: 75

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
jammin06 is offline   Reply With Quote
Old 12-05-2011, 01:00 PM   #5
Join Date: Nov 2009
Location: Albany, GA
Posts: 295
Rewards Points: 250

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.
clashley is offline   Reply With Quote
Old 12-05-2011, 02:18 PM   #6
liscenced electrician
Join Date: Jul 2008
Location: Oregon coast
Posts: 1,012
Rewards Points: 538

Get the highest wattage cfl bulb you can get. 100 watts get kinda expensive and would probably be overkill anyway
jimmy21 is offline   Reply With Quote
Old 12-05-2011, 03:37 PM   #7
Semi-Pro Electro-Geek
Join Date: Jul 2009
Location: Arizona, USA
Posts: 3,045
Rewards Points: 2,990

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 :-)


mpoulton is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Light bulb sockets and wattage ratings Richo Electrical 5 12-19-2014 10:42 AM
Replacing undercabinet halogen bulb with xenon bulb gabbie14 Electrical 10 09-26-2011 10:46 PM
Maximum wattage question Electricnewb Electrical 33 03-10-2009 10:43 PM
Stupid question about energy efficient light fixtures farmerde Electrical 16 11-16-2008 09:26 PM
Bulb wattage hitmehhh Electrical 3 09-21-2008 07:59 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1