Do light sources add up?

[Calecute]

If i have a torch (14 intensity light) right under A and B what will be the light results? Do light from different sources add up, or does it just take the max?

[LadyWYT]

Welcome to the forums! I am pretty sure that if you placed torches at point A and point B, you'd get lighting like the very bottom strip. That is, both ends are the brightest spots, with the light getting dimmer towards the middle.