Ok, LG owners in need of instant response flashlight 1x1 widget start hitting that THANKS button now. I found LG analog of Samsung's Assistive Light minus ugly ass 2x1 widget:
1. Download and install LG Smart World app (google it, it's not yet compatible in the official play store if you're on LG G3)
2. In it scroll down to utilities section and download and install Flash Light, Simple Version by CNJ SOFT
3. Drop a widget on your screen regular way
4. Pop a beer
5. Enjoy instant flashlight
P.S. You can uninstall LG Smart World if you want, but there are some nice fonts there you can grab along with some themes.