[Harpmaker]

I too think one of the lighter Black Widow mixes would be right for your situation.

In my limited testing, the N9 panels did not like ANY ambient light on them, but the only tests I have done on such light gray panels were those I documented in my Cream&Sugar thread.

I must point out that I, personally, like a really DARK screen, and the C&S mixes are an off-shoot from my delving into making a DARKER BW-type mix.

I think I would recommend trying Cream&Sugar (the first mix, the LW/CSMS 2:1 - see the thread) since it is easy to mix (and Wbassett is recommending a N9 for you), and then if it turns out to be too light for you, you can roll a BW mix over it. I only recommend this since I don't know how well C&S would roll over the darker BW mix if you tried this in reverse. My honest guess is that BW is your best choice.