Like she said- Ya gotta look long term or they're not going to be attractive at all. I did a cost break down to see how it pans out:
72" 13K LED Solaris- $3500 shipped
11 years worth of expenses:
With changing out 250 watt MH bulbs every 10 months, you're looking at 12 bulb changes- at 3 bulbs a pop and 70 bucks a bulb shipped that's $2520...
Then you have the ballast which are another $450 or so shipped...
Reflectors, if you go with lumenarcs, add another $450 to the pot...
Now we look at heat- With the major reduction in heat your system would not require a chiller so there's another $600+ in savings...
Anybody that has a large tank inside their house knows that the halides put off enough heat to keep the AC churning quite a bit in the summer- I would estimate another $10 or a month, 6 months out of the year equaling another $660....
And don't forget not needing timers, power strips and such- Probably another $50 or so.
Did I miss anything? Those things alone total over $4600 and we haven't even discussed the convenience factor yet. I imagine the ease and convenience of putting the thing up and forgetting about it for years would be pretty nice!