Glass Prisms new idea on old concept

[yachtsman49]

Kerry in OZ
Going back to the days of old and sailing ships one of the ways to bring light to the cabins below was the use of a glass prism.
I removed a through deck bilge pump which left a 1inch X 6inch hole in the deck the space below was quite dark and i decided to have a look at a glass prism rather than just fill the hole.
I priced them on the net both in USA and England the first problem was they were all to big and costing around $350.00 AUS Dollars in searching for glass prisms I found glass retangular Educational prisms from 3 4 & 6inches the right measurement in the US and China, the cost of these from China including free shipping was $12.00 when it arrived I glued a 10mm thick piece of flexiglass to one side to allow for the deck thickness and a further larger piece to that same side to over lap the deck I siliconed the whole thing in place using a clear silicon total cost $50.00 and it works great I'll add a video in the near future cheers guys