all right mate can i just ask why would u want to change the bulb from a 23w to a 14w it dont make no sense u need as much light as u can get. and even the 23w bulb aint enough if ur doing a cfl grow u need a hell of alot more in there than that but if u can get hold of a hps or a mh light do so as it will only help ur plant just thinking of u thats all not being funny ne way i hope it goes well peace!