I believe he was saying the Miracle Gro is your problem. Although, it would be funny if he was talking about Magnesium! Based on the color of the HPS, I would say it does not have an enhanced spectrum. During the vegetative cycle of a plant's growth, it does not use the orang-ish spectrum like it does during flowering. If there is an issue with money, I would suggest going to Home Depot and buying a couple of fluorescents, or envirolights off of the internet. However, if there is no issue with money, a Metal Halide would be best. Save the HPS for flowering.