When your eyes get darkness adapted (ideally, after about 2 hours in total darkness) even that minimal brightness will be blinding - trust me.

I'm also a recent hammock convert, by the way. My preferred hammock light is Petzzl e+Lite, though. I can even sleep with it over my forehead. The Ridgerest works great, no doubt, even outside of the SB, especially if you cut it narrower at the legs, but I have found my 2" thick Thermarest significantly much warmer to sleep. Just deflate it to about 70%. To solve the mat shifting issue I plan to glue on 4-6 Velcro attach points. Should be enough, but need to be placed precisely.

What DD model you've got?