Is the marine 3.0 from fluval worth getting? Id like to keep a lid on it to combat evaporation. But if i read right. Id have to dirch the lid for a better light
I believe the Marine 3.0 is a more capable light than the stick light on the Fluval, but I really wouldn't bother getting anything now. You have lots of time, and may be just fine with the stock light. You don't have to upgrade at all if you still with the low light demand corals.
If you want an upgrade that I'd do sooner than later, please get an Auto Top Off (ATO) unit that automatically refills freshwater that evaporates. This goes a long, long way to keeping your salinity stable, which is very important for coral success. It's nothing you need while your tank is cycling, but this would be my first upgrade here