How big should be the squares in the screen ?
At what height should i install the screen?
The seeds were not free actually i got a good price from a local 40$ CAD for 15 seeds and 2 / 3 germed so im pretty happy.
As for the freebies from speedyi'm still waiting for them
Which is better to flower MH or HPS ?
Yo in regards to your MH vs HPS question. MH is commonly used for vegetative growing due to it's blue spectrum of light. HPS is commonly used for flowering due to it's red spectrum of light. You can veg and flower with either but the best results seem to come from MH/veg and HPS/flower. Some people prefer to use both red and blue spectrums during all phases of the growing
Screens and Y splitters should both be pretty cheap at your hardware store, like under $20