Global Light Adjust
Freeware
Global Light Adjust
Global Light Adjust lets you adjust a light's brightness, a group of lights, or all lights in a scene at once, along with all the keyframes associated with those lights by a given percentage.
Global light is simple yet powerful. As shown above, all the user has to do is enter the percentage value by which the selected light or light group will increase or decrease in brightness. The key is remembering what lights will or wont be affected by the global adjust command, and the key there lies in what you select or don't select in the object manager. If you select a single light, and check Selection Only, only that light, and all it's keyframes will be adjusted. If you select a group and check Selection Only, all lights in that group (and all keyframes for those lights) will be adjusted. If you select nothing in the Object Manager, or if you uncheck Selection Only, then all lights in the scene (and all light keyframes) will be adjusted.
Entering a value above 100% will increase the light's brightness. Entering a value below 100% will decrease the light's brightness.
One excellent aspect of Global Light Adjust is it lets you easily increase or decrease the overall scene lighting without affecting the balance of light. Another excellent aspect is that if you have an extremely complicated keyframed light animation, you can reduce or increase the animation's overall illumination intensity with a single click because Global Light Adjust not only adjusts a light's brightness value by a given percentage, but also adjusts every keyframe belonging to that light by the same percentage.