No, not a problem at all; it is simply that your use of electricity is most efficient at the 1:3 ratio. If you haven't purchased your flowering system yet, consider a larger light if space allows, or put BOTH your MH and HPS in the flower room. You can stuff up to 1200 watts in there and get the benefit of all that light. Again, your limiting factor is likely to be your ability to exhaust heat from a confined area.