New headlamps

[JAM]

I have a 411 Series 6 (was a Series 5), which I've purchased 4th hand. One of my headlights is cracked but still functioning, while I've noticed condensation inside it and another one of the headlights. My question is if anyone has any experience of replacing the halogen headlights with brighter ones. Any guidance would be appreciated. I was also considering replacing indicator lights with brighter ones (LED maybe). Any tips on that would be much appreciated too. I should point out that I'm in Canada, so I don't have the same easy access to mechanics with Bristol experience as many of you have.

Jonathan