Mark, that was my 1st thought, but he's talking about using a dual filament bulb in one position of the 2 bulb system, running lights separate
Bill
Hey Bill,
So, the standard way of wiring an 1157? That works. That's what I do to my lights. In fact, next in line are my grill lights which I will convert to take either an 1157 or an 1157A.
When trying to find what bulb is best, search Google for automotive light bulb lists. Usually you can find a list that shows what voltage, what base, how many candle power, etc. Of course, sometimes picking out the brightest bulb isn't always best. Dash indicators come to mind where the glare can be brutal.