I'm not exactly "sitting in front of" the tank for 13-14 hours but my parents are up and working by 6 in the morning (work from home) and then I don't usually get home from school till late afternoon so I watch the tank at night. In order to work for everyone, the tank needs to be "lit" from about 7AM-10PM so I'm trying to come up with a "low light" kind of setup that we can all "watch the stuff" when outside of the "noon day sun" of the halides.