No but dont just do it, keep the light far away the first night and go 23/1 than 22/2 than 21/3 each night until you get to 18/6 and move the light a little closer each day as well. Dont just blast them into what you want to avoid issues. They are used to flo their system is used to it so take it slow let them adapt also dont forget you are going to use more water as well you are very much speeding things up for them.