My growbox is 80x80x160 cm. I have 250W HPS and 200m3/h extract fan. If I have light 25-30cm from plants, temp is around 29-31°C which is too much. So I must have light at around 45cm from plants, which give me 27-28°C, but I lost some lumens. So my question is: which is better - to buy cool tube and have light closer to plants or buy intake fan? Will intake fan cool growbox? I want temp 23-27°C in my growbox.
