If you want your candle to look like the one in the photograph, all you have to to is leave the planet. I mean how much could it be to fly on a rocket out of the atmosphere and light a candle in space? Probably like flying to Hawaii.
Due to the minimal gravity in space, the air density is the same and the heat disperses evenly, giving the flame a spherical shape and the same color throughout. Isn’t science just grand? Check out more of the candle in space by clicking the link below.