starting 12/12 today

im using a 400w mh, unfortunately i cant get a hps bulb. starting 12/12 today. any advice? other than not yielding as much buds, what else do i need to worry about with the mh???
thanks buds

It will work, will be slower but will work, why not get the right bulb? Watch your growth, mine grow two feet in the first few weeks of flower you dont want to burn the tops.

i have two plants just shy of 4' each. i adjust my light, keeping them between 6-3" i wasnt expecting that much growth. ill be prepared. i cant find the bulb to fit my ballast. its a mh59 (im a rookie)

any more input?