What you need is to separate the light source as far from your eyes as possible, say 150 million kilometres.
That would be too far to run a power cable so you would need some form of self preserving light source, nuclear fusion would work best.
From such a distance it would need to be absolutely enormous, probably in excess of 1 million kilometres across.
This would give the unwanted side effect of having its own gravitational field, causing the earth to rotate around it.
So unfortunately you would only see the light for about 12 hours each day.