glowstone arrows

the glowstone arrow is an arrow crafted with an arrow and 1 glowstone powder.

the purpose of a glowstone arrow is that it glows once you shoot it. so as its flying through the air it will illuminate everything that it flys past. once it hits the ground it will continue to glow intil it eventually de-spawns. 

and if it hits a mob or a player than they will glow until the arrow de-spawns. this is useful because sometimes when exploring caves (especialy in the new caves and cliffs update) you may need to place a torch but you can't because

it's too far away.