gag…the radiosity inside blender should be improved.when you use radiosity on some scene everything is joined together with million times subdivided(designer).you can not edit any complex mesh anymore.thats why i do not use radiosity.
Even if your light emmiter was too bright you could still just turn down the ‘Multiply energy’ value in the radiosity buttons. Then you wouldn’t have to recalculate.
Funny thing is that I always have the exact oppossite problem - the scene is too dark and my emmitors are at max… hmmmm.