|The following is based on pre-release information for the canceled Fallout Online game by Interplay Entertainment (Codenamed Project V13) and is not considered canon.|
Only mentioned in the The Armageddon Rag, DayGlow is a weapons manufacturer possibly specializing in chemical weapons.
The company was mentioned in reference to the "Chemblaster™ 3000™ CDS," a chemical weapon said to utilize "DayGlow technology for high-speed/high-accuracy dispensing". As evidenced by the company's name, it is located in Dayglow.
DayGlow is mentioned in The Armageddon Rag, Vol. 4 under Crazy Ivan's New and Used Guns.