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Can I use a 400W bulb with a 600W ballast? When we have a 400W or a 600W etc etc ballast, does this mean that we can use UP TO the wattage of the ballast or do we HAVE to use THE wattage of the ballast?

Gutted :sad: ! had to terminate 3 Plants today as they identified themselves as males and I know what a fertile male can do to young actractive girls. I have been there lol. Oh well 7/10 aint bad. Bring on the new female cuttings.(not from the plants in flower obviously ;-))

Hi All, Please advise at what stage I should top my girls? I have read on here time and time again that if I top my girls I have a greater chance of a double top bud. Is this true? When should I do this? I have switched to 12 & 12 today! This is the end of their 5th week and look big and...

The attached pictures are of my first grow. You may see from the pictures aspects of my setup, however just to clarify: 1 X 400W HPS bulb/ budget hood 1 X TT125 extraction + carbon filter 1 x TT100 inlet 1 x 3 speed oscillating fan 1 x 3 speed oscillating air cooler/humidifier Room = 2.2L x 2.2W...

This is my first grow socan you advise if this is neut burn or too much heat? The picture below show all 4 issues i see. This is an attic room and temp has reached 100f twice that i know of. Temp now (f) 75 - 80 Day & 70 - 75 Night. Humidity a steady 50 - 60% Feed for last week = Canna A...