Where is the light strength

I want to make blinking lights, I have done it before on older versions, but I can not find the slider to adjust the lights,I used to see a window for strength below the color I chose to key frame it, but it is not there…I have not had anything to drink…help

ITs the strength value for lamp objects and emission planes. You’ll have to click the ‘Add Node’ button

Oh kay zeealpal . I found another way to render my light object, I used the little camera and clicked on it where I did not want it to show. Worked fine…but I must say that Blender is a great program…but every time they update a version…things change …hard to keep up with all the new stuff.

Where is the add node button?