Grumpy Old Geeks Products Coelux Product Coelux 2 mentions in 1 episode An artificial skylight the hosts describe as creating a blue-sky and sun-like effect. Mentions 97: Airgapping Our Grievances Feb 21, 2015 26:27 These guys, Koalux. 26:55 you get actual, you know, the blue sky effect from this skylight