Very interesting, Kostas. Is this flame on a candle? I can't quite tell. I like how we can see the wick in the center - neat!
I'd play down the bright yellow at the bottom - maybe clone over it a bit? Either that or perhaps a crop just above the yellow area so the eye stays on the flame.
this is a flame into a cup with oil olive , ther is a little wood on the top and there it goes the fuze . The whole thing is lighted under my fathers pic , who has die 19 months a go .. From the time the light it goes away we light it every day .