thats pretty low light... i think you could probably do something with that... i just dont know what... but you certainly could add another light if possible... i only have 2 18 bulbs on my 20long and i have plants growing and doing well
I only suggest plastic because of the ease of keeping, and cost of lights. My light kit cost plenty, more than alll the rest of the gear. then I found out it still was mid to low level!! My bad iguess.