If you seek authenticity, solar oil lamps look like the safest choice that you might have. I think that battlefront army doesn't have the luxury of using electric light sources
For a bit less authenticity and more comfort, resorting to the thing skinner linked is the best you can do.
I suppose that the best way to find something Russia-related is to use Google with Russian key-words (something along the lines of 'осветительные приборы российская армия' in this case, though actually finding something may be rough in this particular case). Russian-languaged wiki may also help. You'd need pictures more than text anyway.
If you're at a loss about actual words to use, just ask us
Also please feel free to contact me via ICQ if you need any translations. Just remember that we're 10 timezones apart
The pics of your events look cute btw. It's a bit unusual to see someone reproduce our army in such detail, but it's a nice thing so watch in any case. Keep up with the good work!