Those are floro I think and only work if it's super strong....just invest in an HPS....]way better I think.
I believe the differant numbers are wattage put out and wattage used,maybe.
HPS will give you more of the end product your looking for.
J DOG 6000 Reviewed by J DOG 6000 on . 1 big 1000W or 2 500W HPS? would the 2 500's be as powerful...I know it will be more spread out. I'm growing 12 plants and plan to veg for awhile as to get the plants to the biggest size possible in that room. Rating: 5