I was going to say I think the bulb may be too much of a load for the output. I guess it is. Glad you figured it out.
I know yall are turbo so I assume you are using the launch control with timing ramp. I just set mine up on the clutch switch. I’m going to tune the ramp on the street so I can try to minimize wheel spin when I start at autocrosses and also on the drag strip at Moparty grand champion competition. We have run on the same tire we autocross with. It’s a pedal fest leaving the line even rolling into it.
Have you had anything weird happen using the launch control ch control or does it work pretty good?