How render very small Object(Billboard) with very hight Emission/Bloom?

I wand render very small object(smaller 1 pixel) with very hight Emission(like Bloom effect) for see this Emmision on big distance, but when object smaller 1 pixel this just not draving and not draving Emisson effect for this, so nothing not drawing. I just want draw Emission for very small objects on very big distance, how do this?