Hi – new user, creating 3-point lighting setup with 3 lamps (2 spots, one point). None of the lamps have an Energy slider (or Falloff, Distance, etc. controls) in the Lamp Properties panel. Only the Size slider appears. I have all items checked under RenderLayers panel (tho not sure if that matters) and a material applied to one object in the scene. Version 2.71. Found no “missing energy slider” reports after forum search… Bug? User error? Please help! Thanks in advance.
You need to use the correct renderer
It sounds like you are using the Cycles Render engine while you want to use the Blender render engine
Select the correct render engine from the drop down list at the top of the blender window