A lot of places sell large tall candles for outdoor illumination (patio and the like). I gots meself some at Ikea with nice glass candle holders. They help create a very nice atmosphere when you are whiling away the time sitting under the stars and having a drink.
However, candle design seriously blows: the flame height and heat is not enough to melt the entire surface evenly, because the candle diameter is too big! So, as the wick is slowly burning out, the flame gradually descends inside the candle, deeper and deeper into the wax, until all the light is completely obscured by the candle walls that have not melted.
If you design an outdoor candle (I am not talking about decorative stuff, which is obviously not meant to burn evenly if at all), invest some time to actually come up with a proper height to diameter ratio, so that the candle burns properly!
That's all.
However, candle design seriously blows: the flame height and heat is not enough to melt the entire surface evenly, because the candle diameter is too big! So, as the wick is slowly burning out, the flame gradually descends inside the candle, deeper and deeper into the wax, until all the light is completely obscured by the candle walls that have not melted.
If you design an outdoor candle (I am not talking about decorative stuff, which is obviously not meant to burn evenly if at all), invest some time to actually come up with a proper height to diameter ratio, so that the candle burns properly!
That's all.