Are your lights static and baked ? Maybe their effect should be seen far away with baking.
I think you could also try to up the MaxDrawDistance to its maximum to override the default value that may be smaller.
Finally, for the lamps, you can use an Emissive Material to fake the luminance of the light.
From far away, maybe use an halo (achieved with a billboard) to make the point light more visible.
I am not an artist so not sure if I put you on the good way…
