What's a quick way to turn on the torch?

In my accessibility settings on my Samsung Galaxy Ace Plus (GT-S7500), there is an "Assistive light" option that "Turn[s] on torch to see better". It activates the light on the back of the device. Is there a way I can activate the light quickly without having to go through the accessibility settings? ps: If someone could tag this with "torch" and possibly also "gt-s7500", that would be great.