An attribute which begins to burn immediately at first impression as the viewer becomes increasingly aware the subject is indeed NOT attractive to look at.
Typically, as a romance wanes the candle burns faster.
The beauty candle for some women burns rather rapidly; almost a flare, really.
For others the beauty candle burns slow, taking hours, days or even years to realize "Hmm... She's kinda weird looking. Not pretty at all. What was I thinking"