HPS?

[invision]

i dont understand how can people flower with cfl....it would take 6, 1k lumas (spelling?) to equal one hps.....n i see people flower 4-5 plant with though.....soo shouldnt i be able to flower 4-5 with a 70wat hps?

thats because people are greedy and flower more plants than the lights can handle, 2 plants max and flower at 2 weeks