I've used halogen bulbs, but yes, they will melt lenses, depending on how close they are. No issues in my MoD lights with glass lenses of course. I tried one in my 95 D1 rear bumper marker light. Didn't have any issues with overloaded circuit but it did melt the lens.
I have one in my rear indicator light specifically to add additional load. Since getting rear ended and having the bumper light melt from the crunched exhaust, I was getting a fast blink on the left side. The halogen bulb is a temporary fix. Since it's intermittent I'm not concerned about a melted lens.