I agree Dark.
Searing Light does not have "Cleric flavour". Clerics are supposedly priests, and therefore should have the flavour of their patron god. It does have "Cleric of Pelor" flavour. But, since its on the base cleric spell list a cleric of a god of darkness, like Nerul or Shar could use it just as well. Which I find silly. Of course I find pretty much everything about the cleric class silly, especialy as far as spell selection.
I also contend that if Searing Light is too good, mechanically, to be a 2nd level Wizard/Sorcerer spell (which I dont actually think it is) it would also be to good to be a 3rd level Cleric spell, since the idea is that Clerics have much lesser magical damage dealing powers. Supposedly.