I did not know such a spotlight, only the cannons. The gun has warmed a small hall in the shortest possible time, because I thought the radiator is sufficient for my ~ 20m² garage. The garage is made of solid brick. Only on Senktionaltor it attracts a little everywhere in (space is supposed to be sufficiently ventilated ....).
Unfortunately, it is not enough to this little room to heat. An utter bad buy the unit was however even if you are staying in his viewing angle, it is already warm. I hoe eg in the garage occasionally some wood, then I imagine that thing right behind me then lets it withstand)
Next time but I'll get a gun, then working again makes more fun;)
(This is my opinion)