If you're referring to my comments and advice re. the Migro lights, I did not argue that they're not "powerful enough". They certainly are "powerful enough" to grow cannabis. However, there are other lights that are commonly used in a 2' x 4' environment will result a substantially higher yield, all other things being equal.
The Migro Array for a 2 x 4 is a 260 watt light and the PPF is markedly lower than the PPF from the Atreum 3200 or the Growcraft X3. Migro lights are a brilliant design and they're inexpensive, one of the tradeoffs being that a 260 watt driver is used. That reduces manufacturing costs which allows Migro to sell a cheaper product. Shane recommends modest levels of light, he's created products that generate those levels of light, and he is able to undercut the price of competing products. The competing product are more powerful but, if growers are happy at 260 watts in a 2' x 4', Migro has an excellent product for those growers.
