S.L.
If I need something I use it. Lights on if it's gloomy or darkish, off if sunny day and bright. I set the AC on but as high as I can stand it and then it clicks on when it reaches that high or stays off if comfortable. I think if it's not constantly running it's not costing as much. I don't leave lights on day or night if I'm not using them or in the room but I'm not as hyper about it as my husband is. But he works to pay for it too so I can accept that.