- Joined
- May 27, 2020
- Messages
- 85
- Reaction score
- 48
Many plants and animals need a true dark period.
Many plants flower based on the length of day and even a short light at night will interrupt flowering.
Dark as in dark of night, middle of a moonless night Pacific dark.
Many buildings never get really dark, and even if the tank light period is short, in the summer the house is relatively bright inside after the light turns off.
Even in the darker section of a house (say a Butler's Pantry (hall with some cabinets) it is "daylight" from sunrise to sunset.
And light spill to the tank from other rooms in the house.
And at night a lot of light spill into the house from house and street lights.
Should a tank be covered when the tank lights are not on?
Should the tank light photo period simulate the changing length of day or are corals evolved for the equator and 12 hours from sunrise to sunset? Or some corals?
The corals I have seem to react that "dim" light is night, and only open up when the tank light gets bright, and even start to close up during the long ramp down.
Maybe the corals just react to the zooxanthellae? I assume corals have primitive photo receptors?
I prefer to sleep in the dark. And won't hazard about fish.
-Big Mistake
Many plants flower based on the length of day and even a short light at night will interrupt flowering.
Dark as in dark of night, middle of a moonless night Pacific dark.
Many buildings never get really dark, and even if the tank light period is short, in the summer the house is relatively bright inside after the light turns off.
Even in the darker section of a house (say a Butler's Pantry (hall with some cabinets) it is "daylight" from sunrise to sunset.
And light spill to the tank from other rooms in the house.
And at night a lot of light spill into the house from house and street lights.
Should a tank be covered when the tank lights are not on?
Should the tank light photo period simulate the changing length of day or are corals evolved for the equator and 12 hours from sunrise to sunset? Or some corals?
The corals I have seem to react that "dim" light is night, and only open up when the tank light gets bright, and even start to close up during the long ramp down.
Maybe the corals just react to the zooxanthellae? I assume corals have primitive photo receptors?
I prefer to sleep in the dark. And won't hazard about fish.
-Big Mistake