Hi!

Ok lets face it. The cone looks cool but is unusable at night because its horrible hard to point the cone where you are currently building. People ignore that fact because vanilla factorio's night is not really pitch black. When you use a brightness mod, which really makes the night a night, you NEED the cone to build at night and THEN you relize that its a pain in the ass to point where you want to build. Especially because Factorio has 45° snaps due to keyboard controls.

So I got the fucking great idea that it would be awesome when the cone lights where you are pointing your mouse. This would make it natural, because usually you look where your cursor is and IRL you point your flashlight where you are looking at. Perfect match!

But.... is it doable?

There's a mod for 0.16 (which is in turn an update from 0.14) that makes you look at whatever entity you hover over, so theoretically it should be possible to aim; but I'm fairly sure it would still be locked to 45 degrees.
https://mods.factorio.com/mod/searching-flashlightR

It can be done with the hidden car under the player.

Try this mod: https://mods.factorio.com/mod/TorchLight