dankmann,
The site that you mentioned does have good prices on ballast/socket/lamp kits ($74.90)
Generally speaking, larger lamps are better. If your grow space is long and skinny however you may get better results with 2 or 3 smaller lamps. The tradeoff is better efficiency with larger lamps VS even light distribution and the ability to get the lamps closer to your plants.
There are some circumstances in which 2 400W lamps or 4 250W lamps might outperform a single 1000W lamp. The 1KW lamp often works best with some sort of light mover whereas the 400's and 250's can be easily used in a fixed position.
If I had unlimited funds I would go for a 1KW lamp on a light mover. That would allow you to get much closer to the plant tops and give you nice even coverage.
Everythings in life is a trade off.
Peace, Harrad. |