ConcoursMustang Forums

1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year => 1966 Mustang => Topic started by: Josep on December 24, 2015, 02:54:34 AM

Title: Underdash courtesy light bulb wattage
Post by: Josep on December 24, 2015, 02:54:34 AM: Hello all,

I'm trying to find the correct underdash courtesy lights wattage for my 200 Coupe '66.
The shop manual says 6C (candelas or candles) model num. 631
Have looked through Internet to convert candelas to watts but a strange (hi!) formula appears there.!
I also read somewhere that they originally had 8.8W bulbs.
What I have now is 5W bulbs in there, do I have to look for a higher wattage bulbs.?
Can someone guide me through..? Thanks!
Title: Re: Underdash courtesy light bulb wattage
Post by: Brian Conway on December 24, 2015, 10:52:08 AM: google GE 631
Title: Re: Underdash courtesy light bulb wattage
Post by: Josep on December 24, 2015, 01:55:18 PM: Thanks Brian, will find some of them.!

Happy Holidays.!
Title: Re: Underdash courtesy light bulb wattage
Post by: jwc66k on December 24, 2015, 01:55:32 PM: Quote from: Josep on December 24, 2015, 02:54:34 AM
Hello all,

I'm trying to find the correct underdash courtesy lights wattage for my 200 Coupe '66.
The shop manual says 6C (candelas or candles) model num. 631
Have looked through Internet to convert candelas to watts but a strange (hi!) formula appears there.!
I also read somewhere that they originally had 8.8W bulbs.
What I have now is 5W bulbs in there, do I have to look for a higher wattage bulbs.?
Can someone guide me through..? Thanks!
The UL-631 lamp is rated at 14V, 0.63A, which (by the wattage formula, P=IE) comes out to 8.82W. I had a problem in fitting some replacement UL-631 lamps as the metal base was tapered out at the transition to the glass and would not fit easy. With all the green panic throughout the world, incandescent bulbs are getting difficult to find, so if you find a source, buy extra.
Jim
Title: Re: Underdash courtesy light bulb wattage
Post by: 196667Bob on December 24, 2015, 02:17:45 PM: Josep : I know what you are saying. All of the MPC's give Applications, numbers and candle power, but not wattage. Wattage of course is a good indication of heat generated, which of course can be important for distortion of plastic lenses.
Here is what I have done, which I believe is the easiest way : go to "Bulb Town" site; in the upper right is a search box; enter the bulb number you want to find out about, and wallah, there is all of the information you'll need.

Hope this helps (and it's easy).

Bob
Title: Re: Underdash courtesy light bulb wattage
Post by: Josep on December 27, 2015, 06:25:33 PM: Thanks Jim and Bob for your posts.!
I can get incandescent bulbs here, on the island, easily !! But wanted to get the originals 631.! I have ordered a pair and soon I will have them here.
I will visit thi site to check bulbs Bob, thanks for info.!

Kind regards guys.!

Josep
Title: Re: Underdash courtesy light bulb wattage
Post by: ChrisV289 on December 28, 2015, 04:40:47 PM: Might want to also check out this thread as well if they don't fit:

http://www.concoursmustang.com/forum/index.php?topic=9819.msg57999#msg57999