In a vacuum, two point lights do not directly affect each other through their electromagnetic fields. Light propagates independently of other light sources in a vacuum, following the principles of superposition.
When two or more light sources exist in the same region, their individual light waves can overlap and interfere with each other. This interference can result in constructive interference, where the amplitudes of the waves add up, or destructive interference, where the amplitudes cancel out. However, these interactions occur on a wave level and are not due to a direct interaction between the light sources themselves.
In summary, while the light waves from two point light sources can interfere with each other, the light sources themselves do not directly affect each other in a vacuum.