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

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 08-25-2010, 02:21 PM   #16
Member
 
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 17,248
Share |
Default

Can I install a self-ballasted CFL bulb into a ballasted fixture?


I bought some CFL floodlight fixtures at HD
They were $20 - $15 rebate at the time..a steal...a few years ago
Anyway = they use 65w & are supposed to be equiv to 500w
They throw a lot of light

My HD has a variety of outdoor CFL fixtures & bulbs on sale
Might want to check it out

Scuba_Dave is offline   Reply With Quote
Old 08-25-2010, 02:33 PM   #17
Newbie
 
Join Date: Aug 2010
Posts: 8
Default

Can I install a self-ballasted CFL bulb into a ballasted fixture?


Quote:
Originally Posted by Scuba_Dave View Post
I bought some CFL floodlight fixtures at HD
They were $20 - $15 rebate at the time..a steal...a few years ago
Anyway = they use 65w & are supposed to be equiv to 500w
They throw a lot of light

My HD has a variety of outdoor CFL fixtures & bulbs on sale
Might want to check it out
Frankly, I don't WANT a lot of light out there, on all the time, attracting bugs, etc. Spoils the ambiance. Initially, I was going to go with a 3W LED "floodlight", but I decided that's just not enough light for the intended purpose (illuminating the stairs just barely enough to be seen in the dark). The 14W CFL Bug Light seems like it will provide just the right amount of light to be able to see the stairs in the dark without a flashlight.

Does your 65W fixture use a fixed ballast, or can you put in self-ballasted bulbs of your choice?

Last edited by Daaavey; 08-25-2010 at 03:39 PM. Reason: correcting grammar
Daaavey is offline   Reply With Quote
Old 08-25-2010, 04:48 PM   #18
Electrical Contractor
 
jbfan's Avatar
 
Join Date: Jun 2004
Location: Newnan GA
Posts: 5,634
Default

Can I install a self-ballasted CFL bulb into a ballasted fixture?


You could rent the size ladder you needed instead of buying.
__________________
Yes I am a Pirate, 200 years too late. "Jimmy Buffett"
jbfan is offline   Reply With Quote
The Following User Says Thank You to jbfan For This Useful Post:
Daaavey (08-25-2010)
Old 08-25-2010, 05:00 PM   #19
Member
 
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 17,248
Default

Can I install a self-ballasted CFL bulb into a ballasted fixture?


Quote:
Originally Posted by Daaavey View Post
Frankly, I don't WANT a lot of light out there, on all the time, attracting bugs, etc. Spoils the ambiance. Initially, I was going to go with a 3W LED "floodlight", but I decided that's just not enough light for the intended purpose (illuminating the stairs just barely enough to be seen in the dark). The 14W CFL Bug Light seems like it will provide just the right amount of light to be able to see the stairs in the dark without a flashlight.

Does your 65W fixture use a fixed ballast, or can you put in self-ballasted bulbs of your choice?
The fixture takes any bulb....as far as I know...I can go check
It comes with a 65w CFL bulb w/ballast
You have conduit...maybe run another hot switch for a lower wattage light ?

I also had a motion detector that had a dual brightness setting
It would go down to 10% power (7w for a 75w incandescent)
Then go up to full brightness when motion detected
That might not work if you have trees/branches that would cause the motion sensor to go off
Scuba_Dave is offline   Reply With Quote
The Following User Says Thank You to Scuba_Dave For This Useful Post:
Daaavey (08-25-2010)
Old 08-25-2010, 05:11 PM   #20
Member
 
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 17,248
Default

Can I install a self-ballasted CFL bulb into a ballasted fixture?


Well, it has an electronic ballast
Seems its in the fixture

http://www.lightsofamerica.com/Products/9265.aspx
Scuba_Dave is offline   Reply With Quote
The Following User Says Thank You to Scuba_Dave For This Useful Post:
Daaavey (08-25-2010)
Old 08-25-2010, 05:30 PM   #21
Newbie
 
Join Date: Aug 2010
Posts: 8
Default

Can I install a self-ballasted CFL bulb into a ballasted fixture?


Thanks for all the help and info guys! I believe I know now what I need to do.

It seems like the most logical, least expensive solution is to rent a ladder, remove the existing fixture, open it up, bypass (and remove) the ballast, insert my outdoor CFL bug bulb using a socket adapter (I'd replace the socket, but I don't think the screw holes will line up, and frankly its simpler to just buy a $3 adapter that will allow me to use the existing socket), and re-mount the modified fixture to the wall, right above the junction box, 3 or 4 feet lower than where it is now.

One advantage to using the existing fixture is that the arm attached to it has a nice reach that puts it out over the stairway by a few feet, and also allows the light to peek around the corner a bit to illuminate the front of the house as well.

At the new lower height, I should be able to get to the bulb more easily when it comes time for replacement, using either my existing ladder or a bulb replacement tool on a pole.

Thanks again to everyone who helped me to figure this out. Now it's time for implementation! I'll let you know how everything works out and perhaps even post some pictures once I'm done!

Last edited by Daaavey; 08-25-2010 at 05:36 PM.
Daaavey is offline   Reply With Quote
Old 08-25-2010, 05:58 PM   #22
Member
 
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 6,838
Default

Can I install a self-ballasted CFL bulb into a ballasted fixture?


A mercury vapor lamp ballast starts out with a certain voltage which may or may not be 120 depending on the wattage of the lamp.

As the lamp warms up, its internal resistance becomes lower and lower and if the voltage stays constant the lamp will want to draw more and more current (amperes) until it self destructs. The ballast behaves such that as the lamp draws more current, the voltage goes down which in turn decreases the current draw. The ballast is (must be) matched to the lamp so that when the lamp is fully and properly warmed up the correct amount of current is going through the lamp. (I don't know what the final voltage for a 175 watt mercury is so I don't know what the final current is; voltage times current equals watts.)

If the voltage started out at 120, with 14 watts drawn the voltage would probably be close to 120 and the CFL would work okay. What you could do is put in (and sacrifice) a 25 watt (they also make 15 watt) incandescent and see what happens and measure the voltage the lamp is getting.

Some kinds of ballasts (high pressure sodium) do other things such as inject bursts of higher voltages; a CFL won't work with one of those.
__________________
Stop wasting time re-adjusting the pattern. Have several lawn sprinklers, one for each pattern.

Last edited by AllanJ; 08-25-2010 at 06:03 PM.
AllanJ is offline   Reply With Quote
Old 08-25-2010, 08:52 PM   #23
" Euro " electrician
 
frenchelectrican's Avatar
 
Join Date: Apr 2006
Location: WI & France { in France for now }
Posts: 5,369
Default

Can I install a self-ballasted CFL bulb into a ballasted fixture?


If you don't want a whole alot of light there is many lower wattage verison I know they have CFL or Metal Halide they are small as 50 W MH or CFL there is pretty wide number you can use.

However there are alot nicer luminaire you can use and bring the mounting height down a bit so it don't need to be up that high espcally true with larger lumiaires.

Now speaking of common 175 W MV bulbs the open circuit voltage { at ballast side } typically 230 volts or so once it lit up it will drop down to about 125 to 165 volts range depending on age of bulb.

That one reason why I have to bypass the ballast if someone want to use the CFL in there.

Most CFL bulb life are typically 8,000 to 12,000 Hours very few have longer life but that kinda limited on that.

If you live in very cold area just give you a head up it will take a quite while for the CFL to come on some case it may not lit up so in super cold area normally I recomened either Metal Halide { much better effecicy than old Mercury Vapour } or HPS (High Pressure Sodium ) that only two I know they can lit up low as -20°F { they are rated low as -40°F only if they are enclosed luminaires } If you run the CFL in super cold area leave them on 24/7 that is the only way it keep the bulb warm.

Merci.
Marc

frenchelectrican is offline   Reply With Quote
Reply

Tags
ballast, fixture, light, mercury vapor, replacement


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Adding a wall switch to a pull chain fixture abacuslearns Electrical 17 12-20-2011 06:02 PM
Ceiling fixture install cjhigley Electrical 5 09-25-2009 01:26 PM
Trouble with install of light fixture cmonsterjr Electrical 5 12-28-2008 07:06 PM
Installed Fixture, Unexpected Result bigphaty Electrical 1 06-17-2008 12:25 PM
Trying to replace wall mounted light fixture jtm2300 Electrical 4 08-03-2007 09:44 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.