not an authority, but 1765 lumens isn't very much, i got that from a single 100watt energy saver bulb, and they didn't grow very well at all under that, still, they did better than under a normal bulb.
I've got a 400w HPS right now, its about 10k lumens or something stupid.
Then again, I'm not a mini fluro grower, so I don't know the complete in's and outs.
sorry