I am thinking about installing LED strip lights for garage lighting. I am planning on covering the ceiling with white steel and then running LED strip lights connected directly to the panels. I would run several strips the whole length of the ceiling (30 x 60 x 16 garage).
I concur with the general consensus: While those LED strips MAY be useful for accent lighting or task lighting in close proximity to the work surface, in order to provide enough total output to meet your general lighting needs you're going to need so many of them that it just won't be practical (or affordable).
I have converted my RV interior lights using these strips and very satisfied with them,
That is a VERY different (one might say "night and day") application from what you are currently contemplating. Your RV doesn't have a 16-foot ceiling; and you're not trying to light up 1,800 ft.^2 of floor space.
they are cool, cheap and energy efficient. Any thoughts?
They may well be cool (in both the literal and figurative sense of that word); but I have to question "cheap", by the time you buy enough of them to do the job here. And as for "energy efficient", that may or may not be the case. Just because it's "LED" does NOT mean it is necessarily all that efficient.
These light strips put out 780/900 Lumens/meter. So each strand of 5 meters would put out 3900/4500 lumens. Don't think you would have to cover every square inch.
Pretty damn close.
Using your "best case" figures:
900 lumens/meter / 39.39 inches/meter = 22.85 lumens/inch.
22.85 lumens/inch * 12 inches = 274.2 lumens/foot
274.2 lumens/foot * 4 feet = 1,096.7 lumens per four-foot strip
Compare that to a run-of-the-mill F54T5HO fluorescent tube, which puts out ~5,000 lumens and costs about $3.00:
http://www.1000bulbs.com/search/?q=F54T5HO
So just to reproduce roughly the same raw lumen output of one four-tube T5HO fixture, such as:
http://www.1000bulbs.com/product/93811/BSS-HB4T5.html
you'll need more than 18 four-foot strips of LEDs in close proximity. But even this won't REALLY produce the same light intensity at working height, because you'll lose the optical "gain" of that "high-bay" fixture. Rough guess: Figure on 6-8 LED strips to replace each F54T5HO tube, or 24-32 of them to replace each fixture.
Sounds pretty close to "cover every square inch" (and WAY past "affordable"), to me.
But like Higgins suggested, I will try a test strip and see how it works. Again, I have converted my florescent motorhome light using these strips and very happy with the results. Way more light than I had with florescent. Unfortunately I am not building the garage until Spring so will have to wait awhile. Just wondering if anyone else has ACTUALLY tried it.
If you are bound and determined to be on the bleeding edge, go for it, and be sure to report the results. But don't say you weren't warned.