The Welsh Three Thousand Foot Challenges by Roy Clayton and Ronald Turnbull does a similar job for parts of Snowdonia. A torch with spare batteries is essential for camping, and is recommended even on a day walk outside the summer months when being caught out after dark on the fells would be disastrous. The most useful type is the head torch, such as the range made by Petzl. These allow hands-free operation for the many chores that need to be done in and around the tent. I also carry a couple of candles, which are more economical for general background lighting than a torch, and help save batteries.
Candles also provide a little heat in the tent.
Of course, the dangers of a naked flame inside a tent can't be overemphasised - I only use them in the porch section. It's possible to find holders which skewer into the ground, rather like birthday cake candles. A 'tray' can be devised from silver foil to catch melting wax which would otherwise spoil the grass. It's possible to get small candle lanterns, though they add a little to the weight and bulk on a backpacking trip. They're quite useful when bivouacking in the open.