None of those options are going to give you "explosive" growth or require "hi-tech". The highest is less than 2wpg.1. Go to home depot buy a ballast and install two of their aquarium and plant bulbs. 80 Watts Total costs about $30
2. Buy some VHO bulbs for my VHO ballast. 160 Watts. Total cost about $100
3. Buy some bulb for my 65W X2 PC. 130 Watts. Total cost about $80
I don't want explosive plant growth.
I don't want to go hi-tech or inject CO2.
What do you guys think???
Re: #1 - no need to go with "aquarium and plant" bulbs. Generally a rip off. Personally, I would not be satisfied with 80W, even for a low-tech/maintenance setup.
Re: #3 - $80 that sounds a little pricey for 2 65W PC bulbs.
Personally, I'd go with whichever was easier and cheaper between #2 and #3.