Learn how to shoot well out to 20-25 yards without using your sights. In low light, you're not going to be shooting much further than that anyway. It's no big trick to keep arrows in a baseball size group at that close distance with just a little practice. The best thing is you won't have to worry about being able to see the pins through the peep, having pins bright enough to see, or having pins so bright you can't see the animal behind them.

Get a copy of Byron Ferguson's book "Become the Arrow". It's written for longbow shooters, but his aiming method works equally well for recurves and compounds. And it's a heckuva lot less expensive than a new set of sights.