Well the screen idea is definitely not my idea, but it works like this:
You cut out and lay a number of layers of screen along the top of your tank (along, and on top of a glass hood). I have 3 layers, but I think 5 might be better.
You place them all on top of each other and they act as a filter for your new lights. Since I went from a coralife cf
lighting system at 265 watts total to an 8-bulb 80 watt a piece fixture (640 watts total)- this large increase in watts and lumens would shock my tank inhabitants, stress the fish, bleach out coraline (and any corals, but don't have any yet), and could flare up nuisance algaes. I want to make sure this doesn't happen, so I only use actinics for the first few days, for less time during the day.
Then, gradually, I increase the use of actinics over days untill a full 8 hrs, then the 10000K lights with increases every day of 2 hrs a day until 8 hrs, then 10 hr actinic/8 hrs 10K and then peel off one layer at a time of the screens (one every 3 days).
This could be overkill, but why hurry things? That only gets me into trouble.
This is my way- everyone does it differently. I would do your own research, ask questions, and come up with your own solution. Every tank is different.