T5HO overpowering MH Lights

[MarkoD]

i just put two 150 watt MH (300 watts total) lights with 20000k bulbs on my tank and took off most of my t5s

turned them on and thought they were kind of dim.

been on for an hour now and they still seem dim. and when i turn on the T5HO lights that i left on (170 watts total) it completely overpowers the metal halides to the point where i cant even see the shimmering at all.

what gives?