lighting issue

[lorenz0]

in my 20gal tall i recently went back to my 65watt from my 130watt which i upgraded to about a month ago.

i noticed that it was to much light for my mushrooms and they weren't fully extended. than my hammer coral went transperant. really the only coral that enjoyed it was the zoo's. my GSP also curreled up at the tips. this is on my 20H btw.

jdigital was saying something about to much of a difference in one go and maybe i should have went 4-6-8-9 hours each day.

what do you guys do when you upgrade your lighting?