Growing cannabis with a Cooltube

The Cooltube reflector channels the high heat of the bulb and reduces the distance between the lamp and the apex (top of the plant).

Also be careful about the Lamp / Reflector distance. Too close, the reflector will lose efficiency. Too far, the light must travel a longer distance which will reduce the light output.

Recommended distance from Reflector to Top of the plant :

250w : 18cm from the plant

400w: 25cm from the plant

600w: 30cm from the plant