Literally on the package its written that it can be put vertically. And I know its not really efficient but i'm trying to heat it the most I can so I think its better for it to be there than not !
Sent from my SM-G986W using Tapatalk
Okay, glad you have one that's meant to be used that way- I guess for geckos & such.
Rudeness is the weak man's imitation of strength. Eric Hoffer(1902 - 1983)