I use them in the theater (very silent, no ventilation)
the machine uses one power supply for the part motorization control
and 1 external gradu circuit (from a block) to the lamp 800 watts
while on an engine not-a-no: iris, knives, .....
color changer possibility (optional, but existing outlet)
negative point:
-Lamp and fragile bush
sizeable -poid
blocking -no lyre for easy transport