Star Wars Episode 3: Revenge of the Sith - Hot Enough for Ya?
It's never mentioned how hot the air temprature is on Mustafar (The Lava Planet) nor is it ever mentioned in any 3rd party reference (books, website) Lava usually measures at a minimum 1800-2280 F (1000-1250 C), Now if the entire planet is covered in lava, the entire planets surface would be like one giant stove or oven. Obi-Wan and Anakin could not fight as freely as they are seen doing. they would only survive for a few seconds on the planets surface, after that they would've roasted.
See the examples below and post your pictures
|Just a little strip of Mustafar...