Lighting won't affect the substrate you chose at all, so that's the same.
Even at 2 wpg you will do better with CO2, so that's the same.
Even at 2 wpg, you will fertilize, that will change but in dose and frequency, not the stuff you use.
If you have lights that are on two light timers, you can make the transition easily. I have a 4x55watt solar hood from PetSupplyLiquidators with two power switches. One bank gives me 1.8 wpg, near noon I turn on the other bank for 3.6 wpg. Then reverse in late afternoon. I don't like to run at 3.6 wpg for long as the swords get funky and worn out while the stem plnats go crazy and take over the tank in a week, and I am not into dosing every day now. So, the two banks allow you to back off the lighting, a nice thing to be able to do.