I don't know if you have tried it or not, but I highly suggest the meta peep. There are several different sizes to choose from. The larger ones around 1/4" to 5/16" are great. You will stillget the effect and accuracy of a peep and still be able to see in poor litght conditions. I realize that what works for one person may not work for another but it sure works for me. Also, they are light and the speed loss is nill.

Ed