Something you might consider if your really wanting to stretch the life of those bulbs. It may be possible that you have a short or a weak connection somewhere that is causing the current over the filament to be high. For example my moms house had an electric furnace and one of the clamps that held the 50 amp fuse in place was loose. This cause it to draw more like 60 amps and kept killing the fuse. The clamp screw was tightened and it dropped the current to acceptable levels. If you don’t have a short or bad connection and you still wanna stretch the life you might be able to add a resistor just prior to the bulbs to drop a slight bit of voltage. You can see here on this chart Photo Storage Taken from lux luthors testing here Destructive Incan Bulb Tests - Updated 8/27/2010 (Newer Info Added) | Candle Power Flashlight Forum

That a small drop in voltage only results in a marginal drop in output, but a substantially longer bulb life. On the chart I linked specifically the drop from 15 volts to 14 volts there is only about a 17% decrease in brightness but the increase in bulb life is almost 130%. Just and idea :slight_smile:

Been thinking about giving that a shot… I had an RX7 too. Biggest rush I eve got from driving a car. More than driving one of the newer (at the time) corvettes or my 300zx. Talk about an expensive hobby though. Man those cars were a pain to work on. Seems like they always needed something too LOL! No one can really understand the draw of that rotary engine till you’ve experienced it.