sounds like it might work, but if you're using an 1157 you must be 12V? why not just use an 1156 [I think it is], which is a single element bulb as bright as the brighter element on the 1157?
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
