TY - JOUR
AB - LIGHTING IN FINLAND: DISCUSSION lamp is well suited for producing good quality specular aluminium reflectors are made from lighting of the order of 15 to 30 ImJfP. The super-purity aluminium. The material for the SO-watt lamp will perhaps be more used with bent trough reflectors has generally only a thin increasing general illumination levels. layer of this, but the reflectors for incandescent It is important to remember that the relatively and mercury fittings are made from homogeneous high cost of electricity and the relatively long material. The reflectors are polished before anodising but not mechanically, except in the case annual burning time of artificial lighting demands a more effective and careful control of light in our of projector reflectors. Both highly specular and very slightly diffusing surfaces are used, the country than in many other countries and these factors, together with advantages in brightness former finding more use in projectors and the control and in maintenance, will perhaps cause a latter in ordinary fittings. still increasing use for specular reflectors in many Mr. Penny raised the question about refractors kinds of fittings. In spite of the higher initial versus reflectors in street lighting fittings. The costs of the open 
TI - Additions to the List of Members
JF - Lighting Research & Technology
DO - 10.1177/147715355802300304
DA - 1958-09-01
UR - https://www.deepdyve.com/lp/sage/additions-to-the-list-of-members-3k0loiBjOh
SP - 173
EP - 173
VL - 23
IS - 3_IEStrans
DP - DeepDyve
ER -