[QUOTE=Jim_in_PA;7772181]
LED replacements for metal halide are relatively new, but they likely will pay for themselves within a year based on what I’ve read. And LED doesn’t suffer from cold-related performance issues like fluorescent lighting does. If anything, it extends their life since they are a semiconductor technology. Yes, LED is a bit more expensive to install “today”, but the long-term return on investment is quite positive. I’ve already started converting my home over to LED as the need for replacements happens naturally.[/QUOTE]
I agree that LED is a better choice than metal halide and incandescent, but the statement above is not true when comparing LED to linear fluorescent.
Unless your electricity is hideously expensive ($0.20+ per kWh), then your payback for LED will likely be at least 10-15 years over fluorescent.
In most locations, T8 fluorescent is absolutely your best bang for your buck. They are inexpensive, easy to maintain, and they are a tried and true technology. LED is not much more energy efficient than T8 and the costs are still too high to make the numbers work. Get 4 lamp T8 fixtures and space them at 1-1.5 times the mounting height to keep shadows to a minimum. Make sure you get fixtures with cold weather ballasts (-20F start) and you will be just fine.
Anybody who tells you differently is probably trying to sell you something
A few more years and I might be singing a different tune, but not yet.