My daily dog walks turned into picking handfuls of rushes (with Mr mcprepper becoming competitive and declaring his were bigger than mine) and leaving them to soak in water in a baking tray. Then, we would romantically sit at the kitchen table with our leathermans, peeling the green outer skin off (leaving one thin strip down the side for strength. The final part of the process was to soak the rushes in fat. I, rather stupidly, heated the lard too hot and ended up ‘frying’ the first batch but soon learned the technique. Mr mcprepper then kindly bought me a rush light holder (v expensive antiques on eBay but replicas are on various websites - ‘get dressed for battle’ was the one he used - I’m sure handy people could just make something with a crocodile clip).
Result - light is as bright as a candle, they don’t drip if you angle them correctly, they don’t smell much (I hate scented candles anyway) and, best of all, they’re free (I’ve since discovered you can use any used cooking oil etc) as we have an endless supply on our doorstep. I haven’t figured out how to post links/photos on here yet but YouTube have some nice short little videos showing how to make them.
Mr mcprepper reckons he’s going to stick to his headtorch (he’s only partly on board with this prepping lark) but I found the process actually quite relaxing

Anyway, sorry this is a long post - it took a bit of explaining - it might be interesting to somebody, somewhere … or not!!