'Visible Light' or 'Length of Day' – Which applies to the chickens?

[wordgirl]

Length Of Visible Light: 13h 51m
Length of Day: 12h 51m

This is what our weather website has for us right now – and as you can see there is an hour difference between the two (at least right now). Which would apply to the chickens' fourteen-hours-of-light?

 

[chickaddict]

visible light for optimal egg laying. However if they get to used to artificial light they might forget to go into the coop at night when the sun goes down. Chickens are quite night blind.

 

[wordgirl]

Quote:
They have been going in without a problem, even with some added light. What I do is after they've gone in, I'll go on and plug in their light. And they're quite smart, too – usually when I go back out to turn it off, they've already gotten back on their roosts.

So the 'visible light' is what they go by? What does that mean exactly? Like the light that is in the sky before the sun actually hits the horizon in the morning and the fading light after it goes down at night? Will they wake up to that in the morning? Or do they wait till there's actually quite a bit of light?

 

[Akane]

The rule when adding light is bright enough to comfortably read a newspaper by so I would assume the same rule applies to natural sunlight as well. It may actually be some time in between the 2 you listed.

 

[crosbygroup]

Quote:
"comfortably read a newspaper" is that before or after 40?

 

[Ace918]

And with or without very long arms and or glasses