The Summer heat-beater that maximises Winter sunlight penetration

• The matt-white louvred skylight minimises sunlight penetration in summer and maximises sunlight penetration in winter .

• Can eliminate direct solar radiation all year round if necessary.

• Can reduce direct solar radiation to 24% or 29% of its unimpeded value.

• Will always admit about 42% of visible light from a uniform overcast sky. Reducing light by 60% reduces the eye's capability by a negligible 6%.

Square Solar Controller Lite. Inset - Circular Solar Controller Lite