Sun

Sun is a Vampires primarily weakness. The sun can instantly kill and even weaken a Vampire. Vampires who are younger are able to stand the sun longer than a Vampire who's older.

Jessica Hamby slowly burned due to her being a few years old, but Godric when confronted with the sun, burned within seconds.

With long exposure to the sun, a Vampire starts to look extremely burnt.

When a Vampire dies by the sun, it's considered "Meeting the Sun."

Effects of Fae Blood
Russell Edgington an almost 3,000 year old vampire was able to last in the sun for a good bit amount of time due to him drinking blood from Sookie Stackhouse.

Pre Season 1

 * Lilith
 * Don Santiago

Season 2

 * Godric

Season 4

 * Beulah Carter