WHEN WE LOOK AT THAT IS LOOK TO NATURE ONE OF THE KEY ISSUES ABOUT ALGAE IS LIGHT IT NEEDS LIGHT TO GROW UNFORTUNATELY IF WE GIVE IT TOO MUCH LIGHT IT SUFFERS FROM WHAT WE CALL PHOTO INHIBITION AND IT DOESN'T GROW IF WE DON'T HAVE ENOUGH LIGHT THERE'S NOT ENOUGH ENERGY FOR IT TO GROW