Okay, so... I started transitioning to LED lighting in my house, shop, outbuildings, and yard (in that order, more or less) about 8 years ago.
They were a whole lot more costly when I started, of course... but my placement of LEDs was basically determined by my daughter... she was 7, and had an annoying habit of waking up in the morning, going downstairs, and turning on lights in various places... the same places, and for some odd reason, they were places she didn't have to go... (???) Never figured that out, but one of these areas had four ceiling lights with a quartet of 40w candelabra lamps... so 1600w... and she'd leave them burning all day. It took her a while, and several spankings, to stop that, but she wasn't the only one doing stuff like that, and well... my wife doesn't take kindly to spankings either. (sigh).
Although I could say that the power reduction energy cost was the greatest motivator, it wasn't... it was the COOLING ENERGY cost that was... turning off that 1.6kw heater made a HUGE difference in our summer cooling needs.
Cutting to the chase... I eventually got to The Garage, which is currently home to my primary working machines, as the new building is not yet complete. I had four 48" dual-tube fixtures... that's 8 40w lamps. They worked okay, or at least... I had no real complaints, but when they finally started losing ballasts, I decided to yank them all, and go LED in the garage. At that time, there was no 'choice' of 48" replacement tubes, and frankly, those fixtures left a whole lot of dark areas.
What I did, would probably not suit the aesthetic demands of most, but once my new shop is complete, I'll be emptying the garage, tearing out the suspended ceiling, replacing insulation, knocking out the floor, replacing the drain, adding insulation, and pouring a new slab with hydronic tubing for heat, and installing a new garage door, so that my wife has the entire garage for her car.
But my 'temporary' LED setup is pretty simple- I took a 20ft 2x4, and put 8 plastic lamp fixtures on it at regular intervals, wired them all in parallel, to a plug that connected where my former flourescent fixtures plugged in. I repeated this three more times, for a total of four rows of 8 bulbs each... 32 bulbs.
I used 8w lamps, they're about 750 lumen each, and I used a mixture of cool white (5000+k) and some warm white (~4500k) lamps, I alternated them in the rows, so that any area in the room had BOTH colors shining on it from many angles.
I did this on purpose- My eyesight is sensitive enough to lamp color that, like others above, I find the 'blue factor' to be uncomfortable. The efficiency of an LED comes from the very fact that it's output is narrow-banded... there's no UV, there's no IR... and there's very little spectrum represented in-between... just the color they advertise. By mixing the lamp colors, I get what I feel is a much better color-clarity, than just one lamp color range everywhere.
The design/layout advantage: it's dirt cheap to build, uses ordinary lamps, easy to change (I use a bulb-changer stick), and as different products come around, I try 'em out. Right now, I've got ONE lamp directly above the 10EE that's a PAR-type flood pattern, and it works really well. Now, the cheap/easy is also a bonus, because every once'n'a'while, something in the shop will get ejected, snagged and flung, spit out, or otherwise projected in an uncontrolled direction, and find it's way to an LED lamp. These ordinary bulbs get smashed, it's no big deal, no special-order... just flip the switch, unscrew, and stick a new one in, and go on with life.
Best of all (and the biggest thing that allows it to 'beat' the old FL), is that there's SO MANY locations in the ceiling where light is being generated, that there's basically NO areas that are substantially shadowed by ANYTHING.
I DO recommend experimenting with color mixes... especially if your eyes are sensitive.
BTW... 32 lamps @ 8w = 256w. That's down a bit from the original 8 40w tubes for 320w...
and 32 * 750 came to 24,000 lumen, while the 8 tubes @2500lumen = 20,000 Lumen, that's a 16% advantage for the LEDs.