I think the consensus is that 108 W is enough to grow anything, and would most likely include copious amounts of algae without good CO2 and ferts.So 106 watts would be enough to grow just about anything? I would think that the ability to burst light for little while would help. I can always take the light back for a lesser wattage.
Do you have a link to the ferts you recommend? I am going to get my wife to buy me a co2 kit for Christmas. I just need to buy some time now.Here are your options as I see them:
-Add CO2 today (or ASAP) and order dry ferts online today.
-Return the light.
-Disconnecting one of the bulbs is another option, but with even 54W HO, you're going to needs some ferts and probably CO2, but it will buy you some time.