Yes 24/7 and the shrimp keep the glass cleen I dont think the light is realy strong though but all the plants are thriving its the best I have seen the I think they are all low level light
Crypts,two types of Java Fern, Subwasatang, Ambulia, Java Moss, Duck weed (which I have two clear quite often) Water Sprite, and frog spit. so there is a lot in there its so crowded that I will have to plant up the four foot tank when I get the side panel of glass replaced
Cheers
les