Originally Posted by bartamos
The bulb being sold for 1937 is 32W. 32W divided by 6V= 5.3A, the other two are 65W divided by 12V= 5.4A

I did see bulbs listed at 32 CP. That makes NO SENSE when converted by any formula. So I decided the seller did not know what they were selling. There are many sellers calling it 32W.

I found a box of 10 GM part number 110185 (correct bulbs for 37 Chevy trucks and cars according to 1929 - 1954 Chevrolet MASTER PARTS and ACCESSORIES CATALOG) on
ePay.

Both the end of the box with the GM part number and a close up of one of the bulbs are shown below. Note that the bulbs are marked 32 CP (candle power), not 32 watts.

Why 32 candlepower?? I have found references to, but have not found the actual law, in New York state that is supposedly still on the books that limits headlight brightness to 32 candlepower!

I agree with your statement about converting candlepower to watts because as I said before one would need to know the efficiency of the bulb (how much light vs. how much heat) in order to do so.
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'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.