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The Visual tool is good for general light placement and to get an idea of fc @ workplane. Garages are a little different as they often have large shadow causing objects (cars). I routinely move fixtures closer to walls to reduce shadow between cars and walls. You can safely move fixtures 3ft...

Space is too small to be segregating into work area vs storage. Light entire space as a work area. Recommend 9 12000 lumen surface mount fixture like this one (select surface mounting bracket option adder). Space fixtures 3 ft from walls and 1 in center.

There's something ironic in replacing bulbs that could have burned your house down with dirt cheap LEDs (as if dirt cheap LEDs aren't just as likely to burn your house down). That said at least they claim ETL listing. I didn't realize AmazonCommercial was a brand. Says manufacturer is Global...

I recall some sparky here on GJ claiming that LED lighting isn't required to follow the 80% rule (searching 80% yields no results). I always follow the 80% rule. I'm not a licensed electrician so I yield to those who are. When I Google the question I see there are 100% and 80% rated breakers to...

perfect - 16' is unusually tall for a 25x25 space. This space would be a nightmare to light if it wasn't for the white ceiling and walls. I would opt for a ~15,000 lumen high bay fixture with surface mounting brackets. Qty.9 3x3 layout, all fixtures 3ft from walls and 1 in center. The...

That Guy Scott - You'll have to dig through the visual tool and find something similar. Look through Lithonia IBE & IBH.

Max fixture spacing is 14ft (assuming you're hanging them all at 14'), thus absolute min qty of of fixtures at any lumen output = 15 in a 3x5 pattern. You didn't state the purpose of the space or surface finish. Qty. 24 12000 lumen medium distribution fixtures in a 4x6 pattern yields 91fc @ 30"...

In that case the difference between 5x3 and 4x4 is very small. Which one is better really depends more on the layout of objects in the space. As long as you don't exceed 12' center to center fixture spacing you'll be fine.

If 48' is a 4 bay garage, then 5x3 would work best when cars are in there. 10.5' center to center spacing in the 5 fixture direction x 11' spacing in the 3 fixture direction. Or something close to that.

9 fixtures is not possible to space less than the 12ft apart max so that's not an option. 12 fixtures = 80fc @ 30" work plane 15 fixtures = 99fc ...

Samh - The fixture linked by Ron_J is a 12000 Lumen medium distribution fixture. Don't expect to find anything lower cost than $54 ea. Ron_J - Only downfall with the linked fixture is it doesn't have a surface mounting bracket option. These may fit (link) or could be made to fit. Don't have...

12000 Lumen medium distribution fixtures are ideal for hitting the 93fc target @ 30" work plane when installation height = 12'. Tube lights cease to be your most cost effective solution at 12'.

There are many many rules. The IES publishes several volumes of rules. It's not all about max lumens @ X height. Fixture spacing (aka: spacing criteria "SC") is critical to reduce shadows. Size of objects in the space affects layout placement. Example: Installing a fixture dead center above an...

PNWguy - 9 fixtures in a space that size isn't ideal. The white walls will help reflect light to where you need it, but I'd rather go with 12 surface mountable linear high bays in a 3x4 pattern (assuming your garage is 3 bays on the 39' side). Something like this (with the surface mounting...

twk63 - Considering that you probably paid way more for those fixtures than they're worth, I'd contact Bigass for replacement parts or entirely new fixtures. What IP rating do they claim? Were you satisfied with the illuminance of the space when they all worked?

MerlinsBeard - Not that I'm aware of. You have to select a similar medium distribution fixture to emulate it. Prolighting might have something, but I've never asked. You can tweak the lumen output, wattage and CCT in Dialux, but not the distribution pattern.

At 12' up, even if not flush with ceiling, it's possible that you won't be able to see the junction box.

teejaywhy - Spend the extra $0.76 per bulb and you won't need to replace any lamp holders. Hot to one end, Neutral to other end. Bulb (link)

OK, thread #2 on same topic. Qty.9 of IBE 15LM yields 82fc @ 30" work plane. Average office is 40fc. Detailed mechanical work = 93fc. Based on your stated use, 82fc is more than you need. However, these fixtures are dimmable, so you could just install a 0-10VDC dimmer and set it to your...

They do make edge lit flat panels with driver integrated into the side extrusion. Here's one (link to HD)