From the RS Megane forum...
I've always used PIAA Extreme White bulbs on my non-xenon cars, yes they're pricey but you get what you pay for and they effectively produce 110W but only draw 55W (or whatever the numbers are) through the loom so it doesn’t burn anything out. They're as close to xenons as possible on a normal bulb.
Anyone tried PIAA?
https://rsmegane.com/threads/headlight-bulbs.13410/