Following on from the discussion on here about whether or not candles are a good idea in a power cut - I think they are a risk if they are your only light source, I've decided to put a Lights Out box together. My assumption is that lights and heat go out in a power cut.
I'm assuming that I can find stuff in the house once I've got the lighting sorted so I don't need to pack my box with food or blankets.
I'm assuming a short lived rolling blackout that we are warned about in advance as well as an unplanned one.
I'm factoring in an unlikely but not impossible scenario of mobile towers going down so no mobile phones but, in this scenario, I'm magically thinking 
landlines might still be up.
- Torches including head torches and milk bottle lanterns.
- List of where useful stuff is - like hurricane lamps, garden solar lights, camping stove &windbreaker, whistle kettle, big umbrella if cooking outside, location of precooked food and hot water in flasks if we have advanced warning
- Battery pack and cables for phones
- Candles (yes, I will use them) including tea lights
- Matches
- Lighters
- Radios (wind-up/solar charged one + battery powered one)
- First aid kit
- AAA and AA batteries
10. Duck tape because I'm a prepper (probably a comfort thing)
11. Hooks for the solar powered fairy lights to set up indoors (currently in garden getting the sun)
12. Hot water bottles (if not already in use)
13. Lifestraw (see 10
)
14. Old fashioned rotary dial landline phone - also got one for my in-laws so we can talk to each other.
If you are not a prepper, I would suggest you just get your torches together with batteries and maybe a phone charger and cable. Have a torch outside the box in a place everyone knows about.
I've put some kids fluorescent stars on the box so it will show up easier with a torch when anyone goes looking for it.