One Headlight Brighter than the Other

[bc@rosenet.net]

I changed the headlamp, but one is still brighter (a lot brighter).
The deam one is a yellow color. It does not matter if the engine
is revving or not - yellow color remains the same. I looked at wires
but know nothing about electrical matters - in fact, nothing about
mechanical things either. Any suggestions, I am trying to learn to
do my own work on "Buttercup - a lovely yellow 1968 Roadster."

Thanks for the help!!!
elaine