Both #66 & 67 are nice and refreshing concepts! I like #66 because we could use the O or the OTP or the whole logo. What would it look like if (1) the letters OTP were a little bolder, (2) if the O of OTP was a little bit lower (to match the P) and the bulb was to the side?
Thank you for your great submissions :-) Overall, I really like #72 & #77 but the logo itself will be hard to turn into a stencil! How could you remedy that? Also, could I see #72 with the top of the T a little smaller and closer to the O and P and #77 with a simplify (more symbolic maybe?) the oak tree?