Not very good. Ironically, it seems clearer without the light than does the 600 or 900. I've posted a couple pictures from the 700 (at the high light position, taken in the dark) compared to your 505 with the lighted case (I found one). If you still want the 700 ($30 is too much I think), there's one selling on Mercari.com for $20 (including shipping).
https://item.mercari.com/gl/m60455990960/
I should add, the build is very nice. It's fairly heavy, but not as heavy as the 505 with lighted case. Mine, apparently, has a weak battery – and it looks like a pain to replace as shield in front of the screen has to be carefully pried off (it's glued). It doesn't appear to be difficult to find the battery.