no that is definitely heat stress. it looks the same if you grow plants on cfls and try to bring them outside on a hot day. I would turn your hps on 2 hours the first day, keep using your cfls for the rest of the day. turn the hps on 4 hours the next day, the 8 the next day and finial 12 the next day. this will harden your plants off so they dont look like that.