Here are all the things you can set on a light. Some of these are simply because a light is a kind of actor, not light-specific.

SetAlignmentRotationXYZ
SetAmbientOcclusion
SetAmbientOcclusionBias
SetAmbientOcclusionDistance
SetAmbientOcclusionStrength
SetAtmosphereStrength
SetBackfaceCull
SetBends
SetCastsShadows
SetCreaseAngle
SetDisplacementBounds
SetDisplayStyle
SetEndPoint
SetGeometry
SetIncludeInBoundingBox
SetLightAttenType
SetLightOn
SetLightType
SetLocalTransformCallback
SetName
SetOnOff
SetOrientation
SetOrigin
SetParameter
SetParent
SetRangeConstant
SetRangeLinear
SetRangeSpline
SetRayTraceShadows
SetShadingRate
SetShadow
SetShadowBiasMax
SetShadowBiasMin
SetShadowBlurRadius
SetShadowSamples
SetSmoothPolys
SetSplineBreak
SetStatic
SetVertexCallback
SetVisible
SetVisibleInReflections
SetVisibleInRender

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)