Untitled

Hawke's Bay Tribune, Volume XIX, Issue 221, 5 September 1929, Page 2

The new Phili-Lite glassware fittings or luminaires introduced by Phillips Lamps for the illumination of public buildings, etc., present a number of noteworthy features. Of thief importance is the three-ply glass of which the I’hili-Lite Luminaire is constructed. First next to the lamp comes a layer of clear glass, then a layer of opal tor intensifying the light and then a layer of glass to give the daylight “effect”. The opa 1 skin is only one-sixtyfourth of an inch in thickness, and the inner layer which gives the daylight effect is one-thirty second of an inch This fillers th<; rays of light subdu ing the excessive rod and yellow rays. The outer layei of clear glass is intended only to make up a reasonable thickness to give the fitting sufficient strength. The net result is that the absorption of light by the Phili-Li-.e is only ten per cent, of the total emitted by the lamp. The remaining 9(1 per cent, is available for illumination. This is remarkable as the average amount of light, absorbed by even high grade fittings is usually 0 to 2-5 per cent. The PhiliLite is totally enclosed.