Lights are broken. The brighter spotlight is the old one, the dim light is the new one, the same thing is true for point lights.
I went to an old game file, all the old settings were there... intensity, range, spot angle. I made a blueprint, put it in the new game I am making. I lost all the old parameters and it only has an intensity setting now. Both lights are set to highest intensity, new and old. Look how dim the new light is, it's worthless and has a short range...