As optometrists we are expected to be able to give patients discerning advice about lighting. Much has changed over the years, which begs the question: “Am I up-to-date? Am I able to give my patients the best advice on lighting, with respect to their visual status?”
“The brightness of a bulb is measured in lumens. This is different from the wattage which is a measure of the energy transfer (joules per second). Energy efficient bulbs require an awful lot less energy to produce the same level of lighting and so it is much more appropriate to classify bulbs by their brightness. A reading lamp would measure 400+ lumens and room lighting would be over 1000 lumens.”
Follow the link to this excellent article by Janet Pooley in Eyenews.