40 watt ballast for 20 watt bulbs? - The Planted Tank Forum
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 02-13-2004, 10:08 PM Thread Starter
Planted Tank Obsessed
dogg76's Avatar
Join Date: Jan 2004
Location: North Carolina
Posts: 390
i found a old advance ballast that is made to run 2 40 watt rapid start bulbs. i hooked it up to two 20 watt 24 inch t-8 bulbs. the lights wont come on but if i touch the wires together (the blue+red) sometimes i can get them to turn on and stay on. other ties they just flicker. is there a way i could get this to work or is it to dangerous? i dont have the ballast in a reflector it just sitting in the floor while i mess with it. when the lights came on they were brighter than normal. comments?
dogg76 is offline  
Sponsored Links
post #2 of 3 (permalink) Old 02-13-2004, 10:26 PM
Are these real?
Wasserpest's Avatar
Join Date: Jun 2003
Location: Monterey, CA
Posts: 15,523
It's a magnetic ballast, right? One of the heavy-weights?

If it doesn't work "normally", I would suggest to buy an electronic one that can drive 4 bulbs. Here they cost about $18 in HD. You can then connect your bulbs the normal way, or, when you are ready for more light and heat, 2x ODNO them. Flexibililty!
Wasserpest is offline  
post #3 of 3 (permalink) Old 02-13-2004, 10:48 PM Thread Starter
Planted Tank Obsessed
dogg76's Avatar
Join Date: Jan 2004
Location: North Carolina
Posts: 390
i looked at lowes and the 4 light el ballast were about 29.00. i havent checked home depot though...cheaper there you think?
dogg76 is offline  

Quick Reply

Register Now

In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
quick disconnect between ballast and bulbs steven Lighting 21 07-26-2004 10:23 PM
55 watt ballast driving 36watt bulbs? mr hyde Lighting 3 07-08-2004 11:37 PM
Using 36 watt pc bulbs for the 55 watt ahsupply kit FobbyBobby Lighting 2 05-15-2004 04:14 AM
Another group purchase on GE 9325K 55 watt bulbs ?? aedave Lighting 8 11-07-2003 12:57 PM
55 watt bulbs in 65 watt ballast Pooks73 Lighting 7 06-30-2003 07:38 PM

Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome