I use an old low power LED head torch which barely shines 20 feet but still gives a reflection from the eyes at 30yds+ and a small tactical type high power LED shooting torch with pressure switch rifle mounted.
The headtorch is on the whole time & the rabbits don't seem to care, just flick on the other to shoot.
Someone further up the valley uses something thats as bright as an anti aircraft searchlight when he goes out.
steve