I did a lot of research and had a lighting expert design my layout to hit my lumens targets (he did quite well with hitting the targets). I have over $10K in my lights. They RAB commercial lights and are true 4' led lights (not tubes) and are 5000 degree. I am quite happy with them.

I used to go with lower temperatures in the old shop with fluorescent tubes, but have migrated to the 5000 degree with LED and I do like it.

What I was looking at was something similar to this. Using 8' lights instead of 4' would minimize the visible chords on the ceiling. You can daisy chain them together as well.
https://www.ebay.com/itm/184431987316?

The garage addition is as big as the city would allow. Being on a corner lot, I had to stay 25' from the property line on the side and on the back. The addition is 27-6-0 x 26-6-0. The trusses are vaulted so I can eventually fit a 4-post lift in there. The garage doors travel up the slope. My thought was to put a total of 4 rows of lights along the ceiling where the flats meet the slopes. At the ends I'd run another 8' light parallel to the trusses to illuminate the tall walls.

I've never seen a segmented garage roll up door store/rest on an incline.

But don't overlook the one important comment made so far here that effects the ambient lighting more than almost anything else, the brightness of the interior, floor, walls, and ceiling, It also helps kill shadows.

Not necessarily. These are the LED's I used and the installation removes the ballasts.

That seems almost pointless today, kind of like converting a 57 chevy to EV power.

I fail to see how. The new LED fixtures I've seen have integral LED's. When they fail you replace the entire fixture. By modifying a fluorescent fixture for LED's, you just replace the bulb when it fails. If someone has a burning desire to retain the ballasts with an LED, those versions are available....but why?

Because quality LED fixtures are designed for 50,000+ hrs in most cases (5.7yrs continuous), I expect they have a better warranty then a bulb alone, and they are optimized optically, electrically and physically for an LED application, would be my viewpoint.
Both versions still have the same components cost wise for LED applications, the only difference is the housing/packaging, mounting.

Most of the time when you retrofit LED tubes into an existing T8/T12 fixture the instructions direct you to re-wire the hot feed it directly to the lamp holders (tombstones). Cutting the old flourescent ballast out of the circuit.

This is how mine is done. Liftmaster 3800 on the wall.

Very beneficial to avoid interference with a car on the hoist.
Interference to the door, the door track, and the standard opener that normally hangs down in the middle of the tracks is eliminated.

People are usually shocked I can have an 8' bed crew cab truck all the way up in the air, can open and close the door if I want,
and have a pretty modestly sized shop. The celling and high lift door were pretty important to reaching that goal.

On topic-That's just a couple weak temporary lights in the picture, not what is used to work.

Well that answers that question.

And when and LED fixture fails, which they will, you will be replacing the entire fixture rather than just a bulb.

No need to state the obvious, in 20 years, it will be outdated and old tech anyway most likely, you read the 5.7 years continuous right?

If you believe that lifespan claim, well you'd be disappointed.

I doubt it'd last 5.7 years intermittent. None of mine have.

The last time I was in the lighting area of our local Menards (think home depot), there was not much choice in any LED lighting. You could but the light and fixture (didn't say "replaceable lamps" or not), but those fixtures were all odd sized (44" instead of 48" or 32" instead of 36"). There were no 48" nor any 36" LED lamps in the store. There was almost no choice in any replacement LED lamps only. For that matter, there wasn't a lot of choices for Fluorescence bulbs in any size in stock either.

Tends to make one wonder if maybe replacement bulbs for anything may be a thing of the past. It may also indicate that maybe if your thinking that you want to have replacement bulbs available when what ever you now have, you better plan one storing them for yourself.

Government is and has been pushing LED's for quite some time. Most incandescents are being banned and fluorescents are already being targeted Hopefully the price will come down as they become more commonplace.

LINKY

I used to get more than 5 year life by buying the more expensive Cree LED lights, but the Cree LED incandescent replacements I bought 2 years ago are now either flickering or failing completely. I suspect electrolytic capacitors are failing rather than LEDs.

I worry that the all LED fixtures I see are electrically in series “daisy chain” wired with Chinese made LEDs and may go dark if just one diode fails out of a dozen or more?
None of the exterior of box advertising I have read has contained words such as “parallel wired leds to be single failure tolerant.

Maybe buy 2 extra units - one for quick change out
and a second unit to rob individual LEDs out of to repair the other units?

Not to worry I guess - government planners thought through any potential headaches years ago.......

20 years ... in your dreams maybe. My company has changed over to the new fixtures ... were told they would last 15,000 hrs .... in mulitple buildings and are replacing entire fixtures here and there yearly.

In the building where my office is they converted to direct wire 4ft replacement bulbs, because it was easier due to the building design/layout, over 5 years ago and haven't changed a single bulb as of yet, at the same time one hallway got replacement fixtures and 2 of the 4 have already been replaced ...

After research I spec’ed 4k for my new garage. When they showed up, they were 5K. Lamented sending them back, but didn’t. I’m happy with them.

This is what I use, they light up the room well, they are from a brand of replacement bulb I liked before.

https://www.amazon.com/gp/product/B07L44JCZ7/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

Out of about 15 I put up, one failed first year, it flashes. They sent a replacement when I called and I haven’t bothered putting it up. Room is so bright I don’t notice it. Says 50,000 hours. I dunno. They work though so far after two years. They don’t seem to mind that I plugged in more than 8. The one that flashes is in the middle of the string. I decided to unplug the ones by the garage door unless I’m working under there just in case that caused it. I seldom plug those in because things are bright enough. I think I have 10-12 in the main room and 4-6 in the other. Been very happy with this setup.

5000k is great to work with. I like 4000k in the house where I can get by with it in my areas. Wife likes the yellows in 2700-3000k. A counter guy told me the only complaints he’s had after an install were fixed by switching the people’s kitchen bulbs to 4000k. Said a handful of people picked stuff out and their yellow light made their counter look funny.

Definitely watch the lumens level. IMO, the claimed energy savings manufacturers tout are actually just selling you a low lumen bulb. I’m pretty annoyed by anything under about 750 lumens. Lots of bulbs are like 500- or less. I went to a fan company hq to compare models with a couple already in mind to buy that day. I decided not to after seeing how paltry the light was. I was told by the design team that they wanted some energy rating for the line and that was why. So bad I left without a fan that day.

Thanks for all the responses. It looks like most people are happy with the 5000k. I saw a Facebook ad for the style of lights I was looking at. The company was called Omni-Ray Lighting. I'm not one to buy something from a Facebook ad so I went to their website. Apparently they replace the Chinese driver with one of their own. They say LED fixtures can cause RF interference and their driver takes care of that.

My main issue now is finding an electrician to actually call me back. I've been ready for electric for weeks now and no one will call me back. Finally got someone on the phone Friday and they said they would contact me early this week, come out and have a look. We'll see. Not holding my breath. I don't know how companies can run a business like that. If you're busy, that's great, but call someone back and tell them that. Don't just ignore their calls.