It was looking to me like 1 pin could run a few leds this way, but oh well!
Why I should be able to read datasheets better. http://www.mouser.com/catalog/specsheets/LTV-8x6.pdf
These Lite-On's are NPN on the receiving side and I read collector current (Rating is max?) as 50 mA and collector-emitter voltage Rating at 80V. Does that mean you have to run 80V to get 50 mA while if the V is small you get proportionally less mA?
And another one bites the dust.