I added 4x 6500K LED strip lights since I've read zooxanthellae respond well to that spectrum. The tank brightened up a lot and the algae in the tank really started bubbling. 6500K boosts the vibrancy of the green coloured stuff in the tank. Not everyone's cup of tea for viewing, but I only run the 6500K's during the day and the reef lights slowly fade to actinic during the course of the evening. I think the changing spectrum throughout the day is pretty cool and it highlights different things in the tank.
![](https://lh3.googleusercontent.com/qmiqTaA0WoHSmqRPq3MBz2Phf90jbou3QTl_x48MC7vtZQzb44k9LgncaNx6x8j5Imk9rv535MwL_7q_UZyuWqjgGgSes2ngmKJ-sMOFsZ3-3bASJ5eNsBN_Vc5le3MRz1UAY5DzpFOXwt8crMYL75V2PEivNd5ApnJBXRzHiY-HPeE9sFpQlUVzh6h7h6rUP_icNhQ67w99MeNWMqFDPC0AW2A6jIN0jZEyCgklsrn1GrARQCc529uAvQ0RCdTDWUT1UqUXkeLyVtilOmG8JMklMLfQotV-R0Mssag72cUXAPPwwRb_nOn1oMZyNz4Ho0X04FPGO4LhCB6PeK1GntCJdDSgfHib7jnmPFWDsOp7Qa0Ga-iMWZvoUgB9hUfXQNWyhWm9j_KUYpa2nB8KgUQm-cfGgkDuIovM5GOcgUuyCm1SOsM-c5zokZv9IGemtkBYOzDkjJO_aR3snt3KPo8EjRjhBMMgL25TwOwtn53nS3duv63boA5Ay287XCloiR7-iVFTP3aM75bxS4SUgTfmovnv4wi_67DAkUSJZWAdGJ10CSvYy-Amsw5OmEw_zO0t7ZHIUFfSOuZ7NtJ6voVsdEmwvxrKSpAfqFJjTcSpU3upQPloaKN_1K_wrLcqjP_oQ-v5UE2I9Rnj-w8vVv_O9xSzY--VMP-g146ZrdQwolDu58itDYO_HtTR=w493-h657-no)