Help! Need dimmer on a spotlight

I am a photographer, and I have been using various spotlights to Paint structures at night. I have wasted beaucu bucks on spotlights that are too white (Color Temp). What I really need is a dimmer to Warm the light.



I have 6v and 12v gel battery power to the rechargeable spots and between 4 and 12 amps. I know I cannot use just a pot. I need a dimmer small enough to fit in the spot housing. Should be plenty of room in most of the spots.



What I need is someone with the time to get creative, there may be a market....



Thanks, Dave