how fast should your plant grow if it is healthy under 400 watt eye hortilux

Just curious about the average growth rate during flower..

So many factors affect growth rate...

I had healthy plants under 400W HPS. I grew a strain that more than doubles in size during flower, and most of that crazy growth came in the first four weeks. I'd put them to bed, come back in the morning and they were an inch taller. It was ridiculous! But some strains don't even double, so their growth is going to be slower.