Not too much light, but way way overpriced. I know it's in Canadian dollars, but ouch! I checked the price under the US site, and it's $119 in US funds, for 80watts of power compact lighting. That gives you 4watts per gallon...HIGH light. You'll have to add CO2
, and fertilize several times a week.
All you really need for a 20gallon is 65watts of power compact...which can be had for about half the price of that Orbit unit. Coralife makes a fixture like this.
Here's the link: http://www.bigalsonline
Its about half the price of the orbit, still has enough wattage for most any plant, only thing you lose is the moonlights, which aren't that amazing.
I prefer using the mounting legs, and running the tank open-top.