Coral Lighting hours

[Allan]

Hi Folks
How many hours of lighting do Corals such as mushroom corals require to be healthy ?,the reason I ask this is that my new reef tank has algae growing on the sand.It is opposite a well lit window.I have my lights on all day too.it is clearly getting too much or too many hours of light.
I have a mushroom Coral and a finger coral in there and they are both doing well,
How many hours can I get away with?.
Thanks.

[Allan]

I may add that this is a newly set up tank with no fish in as yet just a few crabs and turbo snails.

[Reefing Madness]

Reef guys run em 10-12hrs. I would not run them longer than that.