I watched this programme yesterday evening and at one point they were discussing the roof covering of steel mesh sheets and how from ground level, because of the angle of the slots in the mesh you could not see the fanlights they had installed. From inside the building the fanlight glass could easily be seen, again because of the angle of the slots in the steel mesh sheets. They then said that no light coming from the inside, could be seen from the outside! I maintain that if light enters at an anglle it must exit at the same angle end therefore must be seen from outside.
So, was the programme being economical with the truth or did this "system" really work. I am used to such prorammes making false claims, but, could anyone throw some light on this! (pun intended)
There's a set on a roundabout on my way to work, and the fins are all out of place so you can't actually see the lights at all in daytime, if I'm at the front of the queue I have to peer out and try to see the lights for the traffic on the right, when they change to red I wait 5 seconds then go...
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