Excess by any for things of any,  always cause the destruction to it, here in case we are responsible for same to trees/ plants etc, both at home or in public places as well by having light sources next to it in night,  other than the availability of sunlight in morning as well,  which lead to cause the light pollution to it.  Therefore, It would be good practice to avoid having any light source nearer to trees/ plants etc,  as we are causing the over-fooding (or excess-photosynthesis) to it. 

                                   i. e. Night lightning to trees/ plants etc cause the over photosynthesis to it,  which in turn regards to case of polluting to it.