This certainly does glow warmly. The figures at the bottom seem almost alight. Nice tree, though I'm not very fond of Christmas images. The title led me to expect a somewhat more religious image although it did not, of course, specify faith in what. I'm a little less keen on the positioning of the tree with darkness off to the left. But maybe this is part of the effect you wanted here? It seems to suggest exclusion and cold to me, as if to remind the viewer of those left out. I'm not sure you meant to suggest that, though. Or maybe you are trying to make a point about the commercialisation of Christmas? I'm not sure you meant that either.
It's certainly interesting and I'm intrigued to know if you intended any particular interpretation of this. In any case, I agree that it is a nice tree and you do have a warm glow here.