HC Deb 03 August 1939 vol 350 c2616
57. Mr. Groves

asked the Lord Privy Seal if, in respect to domestic electric light bulbs in case of emergency, his Department has considered, or experimented with, any process for the dimming or covering of the globe thus preventing outside reflection but leaving reasonably sufficient interior lighting; and, if not, in view of the fact that curtains or blinds may not be available or serviceable, will he consider the possibilities of such light cover, and consult local electric light authorities as to the provision of stocks of these covers?

Sir J. Anderson

A number of devices for the dimming and shading of domestic electric light globes have been brought to the notice of my Department; but, as I indicated in reply to the hon. Member's question on 1st December last, none of these devices will give sufficient internal light without external visibility, and there is no practicable alternative to the screening of windows.

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