It was only a few years ago that the upper limit of "low light" was about 2 wpg of NO (T12 normal output) light. Now we use not only T12's but also T8's, T5's, metal halides, and screw-in "compact fluorescents", among others.
There have been disputes over the the proper amount of lighting in which one party would say that 1.5 WPG was enough for a certain environment while another would be in favor of 3.0 WPG for the same environment. Each was thinking about a different kind of bulb.
So: Assuming the same environments (reflectors, water clarity, bulb age, etc.), how does the amount of useful light energy produced compare for the several kinds of bulbs that we have available?
Thanks.
Bill
There have been disputes over the the proper amount of lighting in which one party would say that 1.5 WPG was enough for a certain environment while another would be in favor of 3.0 WPG for the same environment. Each was thinking about a different kind of bulb.
So: Assuming the same environments (reflectors, water clarity, bulb age, etc.), how does the amount of useful light energy produced compare for the several kinds of bulbs that we have available?
Thanks.
Bill