Hi Lim - Klang AirCond Company has MB bulbs from Japan that produces 50% less heat. I changed the aircond bulbs to this one. Perhaps they might have one for your dashboard with a higher voltage?

The address:
11, Lrg. Raja Bot
41400 Klang
3341 1998

__________________
... Kerry

126 tailed by a 203, 129 leading the pack.