Good, then once you determine the height you can safely put your light over canopy...take note. as plants grow, keep light safe distance. Invision said it well. I say it like this.

put hand at top of canopy. lower light until you cannot stand the heat for a full minute...once that distance is determined...raise lamp 2" and keep that distance consistent throughout grow...peace

p.s. always have a fan dedicated to the airspace between the lamp and canopy, and you will be safe. Another circulating fan is required also.