HI-99C blackout screens have a blackout ratio of 99.9% which can prevent daylight from entering the greenhouse. This artificially shortens the length of the day and allows products such as chrysanthemums, gerberas, kalanchoas and medicinal crops to be produced all year round. 

Choosing an aluminum upper side retains most heat, while white is better for cooling. And for the underside, choosing white will intensify the effects of supplemental lighting. Their unique knitted structure reduces condensation and allows them to be bundled to a small size for maximum available light.  These moisture-regulating properties enable you to maintain the ideal temperature and climate in the greenhouse