Newby. Creating unusual scenes

Can someone walk me through the steps to create a scene that will turn a light on when another light in the same room is on? My sinario is this, I have bright over head lights in my kitchen and low light lamp. To have them on at the same time is a waste of energy. So if the kitchen light is already on and I want the lamp on, the scene would turn off the kitchen light when the lamp is activated and vice versa. The problem I ran into was I could not get them both off. I hope I explained it well enough. Thank you all.

Logically what you want is:
if (BrightLightIsOn and DimLightIsOn) then

Vera Scenes do not support “AND”
To solve this search for conditional scene execution (Using LUA) or PLEG