I’ve used the 3 point lighting system to point lights at an object, and now I need to adjust their strengths. Where do I click to bring up this menu?
Which blender/engine are you using? Although, with light selected I expect on the light tab in the properties panel. Generally you want to use area lights or spot lights for such lighting to avoid spilling light where you don’t want it.
You probably need to enable ”Use Nodes” in the light’s properties.
How do u access the light’s properties
Select the light object in the outliner, then click the little sun icon in the object data section (where are the properties for scene, camera, materials and so on).