I too have a 55 gallon just getting started and new to fresh water plants I have Discus and Angels 6.7 PH 83 Degree water substate at the bottom just starting with plants soon CO2 i have a 4 bulb T5 54Watt light do i need 2-3 or all 4 bulbs lit for 11 hours a day also what about atinic bulbs?