The Solar Night Light is unique to our website in that you get a free Solar Night Light with every Velux Sun Tunnel you purchase from us. If you buy the Solar Night Light separately, you get the 30% Federal Tax Credit. The Solar Powered Night Light delivers a moon like effect to the Velux Sun Tunnel. With a gentle illumination, this artistic effect lighting allows our Velux Sun Tunnel to look and feel alive both day and night. This lighting is purely to capture the essence of your new Velux Sun Tunnel, even after the sun has gone down. Its all about feeling alive!