I've heard of one danger but it's probably an old wives' tale - the top condenser may crack from the heat from the bigger bulb. I have a D2V that came with a 212. It also had a heat absorbing glass in place above the condensers. Printing times were so short I replaced it with a 211 so I can't confirm any problems. Nonetheless, I'd be a bit careful about allowing cold air on the top condenser after a long printing session.(posted 9231 days ago)Check also that your timer can handle a 150W bulb. The inrush current can be quite high which may cause the switch to fail if it's rated for a smaller bulb.
Cheers,