Thanks again for all the input, I decided to stand pat and order new bulbs. I think what really made my decision was looking through pictures and see how well my SPS have done over that past year.
Also scared my SPS either they wont grow or they'll burn up. I have been surprised how well my SPS have done under a six bulb T5 lamp.
I looked back through some pictures and found that my SPS doubled and tripled in size over the past year, almost all just frags when I started