I have used these in GB444 soy tealights with much success. I have not had issues with my tealights going out. A full melt pool is achieved without (the container that the tealights are placed in) getting too hot. ECO 1 tealight wicks throw (scent) great and trim themselves with hardly any debris in the melt pool. They look long, but if you light one as is, in my experience, they don’t soot and they don’t produce a consistently tall flame. They burn for over three hours, but I haven’t burned mine for more than 2.5 hrs at a time. Be sure to carefully straighten each wick by hand to center it after pouring. I have burned tealights with slightly off-centered wicks and they burned fine. Be sure to be gentle when straightening wicks to minimize the risk of spilling wax, especially using aluminum tealight cups.