[Jorge Alix]

They are not animable, but there is a work arround, for instance create a light and animate the intensity in the same values as watts in maxwell emitter, then open the Connection Editor and connect the light intensity to watts emmiter.

[Jorge Alix]

have a look to this DivShare File - lights.swf

[3dtrialpractice]

jorge,

good idear with that workaround!
very nice tut.. Thanks!

[Jorge Alix]

Thanks all!
You can use the same technic with params in Physical Sky, for instance to simulate the time lapse.