With new, energy-efficient LED technology, we can no longer rely upon wattage to indicate how bright a bulb is. See how to measure lumens below:
Our economy full spectrum bulb puts out 1600 lumens of light BUT (and here comes the science lesson).
Which trips everybody up is the inverse square law of light (and other energies).
You receive 1600 lumens of light from our 1600 lm light bulb when you are close enough to touch it.
Step back 1 foot and you are now receiving 800 lumens of light (1/2 the light).
Step back 2 feet and you are now receiving 200 lm of light (1/8 the light).
Which is how much light each bird cage is receiving based upon how far each bird cage is from the light source.
In a perfect world a full spectrum bulb or LED fixture should be placed 6 inches above each and every bird cage.
What’s more important though than the quality and intensity of the light is the light (timing) cycle.
Birds perceive light through the pineal gland located behind the right eye.
They see both the visible light spectrum and the in visible light spectrum (UVA/UVB) and the pineal gland is used to tell the bird about the quality of light and to keep its circadian clocks in tune.
All birds have multiple circadian clocks/rhythms (both more precise than a Rolex).
One indicates time of the day which they can do quite precisely (but they just don’t know what day it is).
Birds access another circadian rhythm to determine what season it is.
This is where signals come from telling birds to molt, to migrate or to make babies, which is why whenever I begin to question a caged bird keepers issues about prolific egg laying or plucking – I always start with question about light.
At the end of the day you’ll want to have a light cycle of 12 hours/12 hours darkness, not respecting daylight savings time because that trips up the birds even more.
Sorry for taking you around the block.
Hope that helps – reach out any time for more information.
Cheryl R replied
anyway I just recently bought a happy light because I am never get out in the sun and I have a Sun conure in my home.
Besides a little bit of light from the windows, he doesn’t get the sunlight either.
I was wondering if this would harm him if I shared it with him.
Verilux 10000 lux
Feathered factoid: All windows in your home filter out all UVA/UVB (ultraviolet) light.
You could share it with him but it would not have the desired effect.
A 10,000 LUX lamp yields about 500 LUX at 24 inches.
For your bird to truly benefit from a light it must be mounted no higher than 6 inches above its cage and have a timer implemented to provide 12 hours of light and 12 hours of darkness helping keep your birds circadian rhythms synchronized.
Also published on Medium.