Lamp energy in BGE does not get higher than 10! Using Blender 2.69. Trying to control lamp strength by setting "own.energy += 1;" in controller script and printing own.energy to console. It works insofar as I can see the lamp changing strength in game mode. However.....
For some reason, the value of own.energy does not get higher than 10! Even if I directly assign 20 or 100 to it! When it starts as 20, as soon as I activate the script it gets back to 10. What can be wrong here??
10.0 is the limit for lamps. You really should not need it that bright. If you do, consider using a Constant falloff instead of a mathematical fall-off. Maybe adjust world Mist values?
Note also that Sun and Spot are the only lamps that cast shadows. And those start and end values have to be set just so.