7" 6 volt headlights

[Mike_Zahorik]

My 1940 Chevrolet developed a headlight problem and I had to replace one bulb. After searching around thru all my stuff I found three different bulb all of which worked, but I'm wondering what is the difference between these bulbs, AND is there a listing of these types of bulbs that would have any specifications for them. The bulbs I have are GE 4030, GE5040S and Westinghouse 6006. Thanks Mike

[Spinneyhill]

http://www.replacementlightbulbs.com/lampsdiscontinuedoutofstock.html

GE 4030

6V, 45/35W, PAR56 7" Diameter Glass, 3 Contact Lug Base, Mazda, 6-8V, C-6 Filament, MOL 5.25", 120/200 Hours, Possible Substitute 6006

 

6006:

GE 25114, PAR56 7" Diameter Glass, Auto-Headlamp, 6.1/6.2/6.2V, 50/40W, 3 Contact Lugs, C-6/C-6 Filaments, MOL 5", 300/500 Hours, SCC 00043168251143, for 12V Systems Use 6015

[Mike_Zahorik]

Thanks for the help. When I tried each bulb I didn't notice a difference in brightness, yet the difference in wattage should have made it so. I'll have to try it again some time.  Mike

[Spinneyhill]

1 hour ago, Mike_Zahorik said:

I didn't notice a difference in brightness

Check you have good grounds for the lights. Paint and rust don't conduct well.

[Bloo]

45-50 watts is optimistically a 10% difference in wattage. You are going to be hard pressed to see that. Doubling the wattage might gain you 10% in distance.

 

The voltage at the bulb, on the other hand, makes a big difference, and is often worse with a bigger bulb if there is significant loss in the wiring.

[Mike_Zahorik]

Yup, you are right about resistance and grounds. I have run an extra ground wire to each headlight and to the back for that tail lights. It makes a big difference. Thanks Mike