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.
Theres a Torch app in the market that toggles on open. 

Do you want a single button on home screen? Then you need to shortcut it.

Do you need it on your lock screen: swipe for widgets.

Do you need it on voice activation? "Ok google, open app flashlight/torch"

Do you want it on your shortcut bar? Drag it from programs.

Im not really sure what you want.