The compiler will normally spot spelling mistakes.
My monitors brightness is turned down so the white sections on a monitor with a lux meter held 5cm away is reading 33 and the room in general is about 100-130lux (I have a lux meter).
I program in a blacked out air conditioned room with a warm white light bulb behind me, so alot like what you might find in a casino lighting levels. Edit:This also helps you lose track of time and become totally absorbed in the code. In the past I even looked into buying an underground military shelter to work in so I can remove all external stimuli in order to focus on the code because the internet is a big enough distraction as it is.
The white colour on the monitor is like the Financial Times "pink" which is more orange but in time you get used to this and dont notice the orangeness.
I program with the MS night light on 50%, have used F.lux (https://justgetflux.com/) before MS introduced it.
This removes the eyestrain enormously so you can spend hours in front of the monitor and ignore the "take regular breaks to avoid eye strain".
I prefer windows ClearType to be off so I can see every pixel in the font like windows 2000/XP, not these new ones which are all smoothed.
Have the "show location of mouse pointer when CTRL is pressed" switched on as its easy to loss the mouse on multiple big monitors.
OS 120dpi font size
System Font size 18, but this depends on the size and resolution of your monitors, so you'll need to experiment with your fonts.
Basic text editor a little better than notepad but not as good as notepad++.
No code autocomplete or anything.