Also maybe consider flameless candles, powered by 2xAA (rechargeable, even). They can turn on/off automatically! Just add candle holders. I suspect they use LEDs, 2xAA lasts maybe 2 months running 5hrs/day (on internal timer).
I've considered more candles in the evening. How long before bedtime do you switch to candles? do you use them in multiple rooms? Obviously it wouldn't make sense to use a computer by candle light, but what activities are you able to do productively?