Canadian General Electric Co. "A-H5" Mercury Discharge Light Bulb | Canada Science and Technology Museum
A constellation of red-hot incandescent light bulbs encased in metal iron spirals, chandelier fixture in a restaurant in London, Ontario, Canada, 2021 Stock Photo - Alamy
Canada to ban incandescent light bulbs by 2012 | Reuters.com
A Guide to Light Bulb Sizes, Types, Shapes, and Codes.