I found on ebay a 6V bulb that promises to be brighter seems to be true. A #17301 bulb 6V 10W incandescent bulb is much brighter than my traditional #63. I put them in my 1935 single sided taillight and they really are. They were only $3.75 each. (Much cheaper than other options). They say the original application is medical equipment. Time will tell if they last. I wanted to share because, "I saw the light!"
Ebay 161410757417
Last edited by wisebri24; 02/18/1805:26 PM. Reason: Ebay auction number
I would use a #81 for the tail light. It's much brighter than the #63. It's 6.63 watts & just over 1 amp. Use the 17301 for your brake light. Painting the inside of your housing gloss white also helps get more light out. Below is a comparison of my 6v '38 using a #81 as the tail light on the left & my modern 12v pickup on the right.
VCCA Member 43216 Save a life, adopt a senior shelter pet. 1938 HB Business Coupe 1953 210 Sedan
FWIW I use the #1129 for the brake light. It's 21cp. It's a larger bulb so I have to slightly bend the bracket to make it fit. I don't know if there's enough room in the '35 housing to do that.
VCCA Member 43216 Save a life, adopt a senior shelter pet. 1938 HB Business Coupe 1953 210 Sedan