To me, lighting is one of the major componets in salt water. I have to have three stages of lighting... Daytime - white lights - 8am - 6pm Evening -blue/purple actinics - but I have read actinics aren't good for octos? Why not? Can you use any other color of light for "evening viewing"? - 6pm - 12pm Bedtime - Moonlights - 12 pm - 8 am (can they handle moon light spectrum?) Since you don't need fancy day time lighting, this cuts down on the price and opens up the selection a lot more. Ideally I would like to contruct some kind of retro fit LED lighting system that has all three stages of lighting. Would LED's work good for an octo application?