Thanks my friend no you shouldn't need to leave the lights on that long just a normal 12 hr period and even sometimes less.. The great thing about Anubias Nana is that it is a self attaching plant like Java Ferns really shouldn't plant them into the substrate but you could if you wanted to.. they are a tougher plant and also a bitter tasting plant so most fish and snails do not eat on these which is why they are a great African setup plant.. The Anubias plants are a hardy type plant that can take abuse from larger cichlids and general lighting is most adequate..
I run Coralife compacts with the 50/50 and 10,000K lamps on all of my setups and is what works for me, I also have live snails in all of my setups with sand beds..
At any rate you can poke the plants threw rocks, attach to drift wood or wedge them under rocks and you can bury the rhizome (roots) in the sand but again these plants will take what they need from the water column..
I run Coralife compacts with the 50/50 and 10,000K lamps on all of my setups and is what works for me, I also have live snails in all of my setups with sand beds..
At any rate you can poke the plants threw rocks, attach to drift wood or wedge them under rocks and you can bury the rhizome (roots) in the sand but again these plants will take what they need from the water column..