I think bleaching had made my skin tone darker. its wierd but my face is darker than even my hands and neck. the dark areas stops at my jawline which leads me to belive that could be the cause. I use Boots own brand. maybe its time to let the hair be blak and look like a cretin in time for winter. great insulation.
i use boots expert hair lightener too.... for the last 7 years. my face was always a little lighter than the rest of my body, i guess because my moisturiser has spf15. bleaching has not affected my skin in any way.
facial hair bleaches on the whole are safe but always best to do a little test to make sure your skin does not react. it's preferrable to waxing (for the skin).
they will not bleach the skin - they are not meant for this.
they will not increase hair growth - this is a myth! virtually all women get hairier on their faces over time (especially on the chin/upper lip region), even if they don't do anything to their facial hair.
skin bleaching however... that's another topic and not a good idea for the skin!