:: The other issue is, why windows? Why not the roof or the walls of a :: house My brain cells distantly recall, solar power windows (opaquish - that is=20 not totally blocked but the light very dim) being installed in a new=20 building for MIT (The Melbourne University not the other one) as part of=20 their materials and environmentally friendly building, possibly in=20 conjunction with the CSIRO - will do some giggling and binging across the=20 universe - one can only go forward (probably Australians only will get the= =20 hidden meaning in that last august statement or Star Trek song fans). Colin -- cdb, colin@btech-online.co.uk on 24/07/2010 =20 Web presence: www.btech-online.co.uk =20 =20 Hosted by: www.1and1.co.uk/?k_id=3D7988359 =20 =20 =20 =20 --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .