The principle that is put coolly tube been based on a glass tube over the lamp. This glass tube can be attached to a fan or an activated charcoal filter. Thus straight separates in small areas the heat problem.
Advantages that coolly tube:
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The plants need less distance from the lamp by the reduced heat
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Particularly small and low areas represent now with the cultivation no more problem
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The exhaust for the waste heat can be dimensioned smaller which again river and volume saves
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Length approx. 49cm - ports on the right of and left in each case 125mm
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inclusive. Version E40,
This kit contains: