Is there a such thing as too much light in your planted tank?

[AQUAGARDENER]

So I'm planning my first semi high tech planted aquarium in a 55 gallon tank. the lighting t5's quad bulb fixture for a total wattage of 256.
CO2 will be dispensed via 2 litter bottle DIY set up and supplemented by Sea Chem Excel as deemed necsasary.
Flourite black sand substate.
Filtration maintained by hang on Emperor and Magnum canister filter systems.
Drop checker heating yada yada yada! Now my my malfunction is should I get these metal halide lights with atotal of 500 watts? Is there a such thing as too intense of lighting for your -plants? Is 256 enough light to nuture the likes of apontogenus,baby tears,lonfolia magenta?oh wise ones give me clarity!