I searched trough the Hella catalog and I found that
the Hella Comet 500 (# 1F4 005 750-811) have following
spare parts available:

# 1F4 005 750-011   H3 Beam
# 1F4 135 230-011   Reflector
# 8GH 002 090-131   12V 55W H3 bulb

As I can see on other lights with several bulbs I guess
this light is only built for 55W bulbs. Not even the
24V 70W bulbs are offered. I'm sure the case will be melted
soon by using the high wattage bulbs.

Helmut
'80 Camper