Deep Catacombs

I was looking into creating an bottomless pit. So I purchased the reflective material so I could improvise a 2-way mirror. I then found a pair of 2'x3' Plexiglas panels and applied the material. A large box from the basement was discovered and I hauled it up and inserted the 2 mirrors, one with its back to the bottom of the box and the other laying on the open end. My son brought out a light used for reading, we placed it inside and we turned it on. The effect was somewhat less than stellar. I was hoping the 2-way would work better, allowing more light through. I didn't expect it to have such a dimming effect. I did allow for this though. I am going to put planks across the opening to imply that it has been boarded up against intruders. As there will be only a little area to peek through the effect should wrok out pretty good especially when I add smoke.