MV bulbs do produce a lot of heat. Some keepers like them some don't. I'm sure they are not exactly the same as streetlights, but similar. I have not used them as most of my chams have been montane species who want less intense light levels. A better place to read about their use will be the more active cham forums at Chameleonforums.com

There is more written about veileds because they have been established in captivity longer and in more places around the world. Again, check out the various forums at the website I listed above. You'll hear more about panthers there.