Most VELUX glasses skylights are available in a variety of glazing options, each designed to meet the needs of specific building situations. All VELUX skylights glazings are build using energy efficient, LoE3, argon gas injected dual glass panes. Velux traditional skylights come in a variety of styles and options. They come in venting and non-venting styles and you can control them via remote. There are even blind and shade options available.