What does that do as far as heat inside the cluster? Do the brighter bulbs fit inside the little colored domes on the interior of the cluster? Id hate to start melting stuff in there

1969 Nova
454/M21/3.31
Mild mid-11 second weekend cruiser

1994 F150 XLT Super Cab 2WD
5.0/4R70W/3.55
(Daily driver)