Cerddinen, A single LED keyring torch works for me. I bought the Cyba-lite Micro and a firefly from www.ultralightoutdoorgear.co.uk both can be either hung or just placed in the tent and give plenty of light. For reading, the Alpkit headlamp for a fiver is perfect.
If unsure about a single LED providing enough light Tesco sell a keyring single LED torch for £1.99 so it won't break the bank to give this idea a try.Ifind id handy for day to day use and the battery seems to last ages.
On a low tech note, candle lanterns are quite good in small tents, because they provide a gentle light and a surprising amount of heat. Has to be admitted, tho, that they're a bit heavy and not brilliant for reading.
i have one of these, they are very bright and it even has a flashing mode for emergencies.batteries last ages and it ultra light, and at £5 it is cheap cheap chaep!
the size is very small but it does give off a blinding light!
