I hate the interior lighting

[Stretchytall]

I began to build my big, indoor factory. So for the first time, I built indoor lighting, and I hate how directional the ceiling and floodlights are. They only fully illuminate one foundation tile. So to have a fully Illuminated interior, I would have to build ceiling lights over Half the tiles.

Is there any way I can get more of an ambient lighting inside my factory instead of a patchwork of spotlights?

[Aranador]

I know some people use illuminated signs.

[Lawn-Mower]

Yeah, use billboards with glow at 3 and GI on. If they're too big, build objects in front to block some of the light. They provide a nice diffuse light, and generally are better indoors than the powered lights.

Getting the powered lights looking good indoors is a real art form. You can tilt the wall and flood lights. You can even get the wall lights semi up by putting on a tilted wall. Try covering bits of the light shaft up to get some nice effect. Hook up to a controller to change colour and turn down the intensity. They're naturally suited to large space. The road side lights are better for smaller spaces (but still cast quite intense harsh light), the others can cast light 30 meters or more. So if you have a ceiling light placed only 4m off the floor, yes it will only light up a small spot, but if they're 16m up they seem less out of place. And yes, you need quite a few of them, but usually have to turn down substantially to make look ok.