If KittyLester needs the lights, it's not for anyone else to judge.
We have a lamp in the hall from the middle of the afternoon, three lamps in the living room ditto. Undercabinet lights in the kitchen all day, two lamps in the dining room when we're eating at night. Bedside lights, bathroom lights, all go on and off as required, but during the night there are no lights on - we have Velux windows with no blinds, so there is ambient light, enough to see for those dratted nighttime loo visits. All our bulbs etc. are low energy.
However, it's would seem that various posters don't need lights, they just use the glow from their haloes ...