Hey guys, I have a 400 watt MH standard ballast (PL lighting group) that's around 10 years old now. I'm looking for a MH to HPS conversion bulb to run during flower. The only bulb I can source online is the Hortilux 400watt(360 actually). It says it will not fit in PL Midi reflectors. Does anyone know where to find an tubular conversion bulb, or possibly a tubular MH that is spectrally correct for flowering? The bulbs that were recommended for that unit are no longer in production, but were the best choice at the time for a "one bulb does all".