#LighttheSite at Local 537 Pipe fitters Training Facility
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We performed a LED Lighting experiment at Local 537 Pipe Fitters Training Facility
We were very interested to see how Milwaukee’s 2155-AC Temporary 70 Watt LED Site Lights would perform in a commercial project site.
We were specifically interested in cost, functionality, time to install,
cost to run, quality of light and longevity.
The LED light itself are high quality devices, and comes with an attached AC cord. Milwaukee built the stress relief into the side of the case and it holds the AC cord quite effectively.
we needed to use an existing Romex cable system that was installed between rooms so the AC cord was the first modification we made to the light.
This stress relief was undone with two captured screws and the cord was easily removed from the terminal blocks. This HD terminal block are set up for quick wiring from 120 to 227 volts, and the cavity acts as an integrated, reusable, junction box.
From the time the electrician started the wiring work until the light was secured in the ceiling by its built in wire cable, took less than three minutes.
We had 4 units up in 15 minutes. Milwaukee really thought through the wiring issues on these lights as the wires have a built-in chase in. Fast and super easy to use!
While our Romex installation was not daisy-chained from fixture to fixture, the 2155 makes this easy to accomplish if needed with a back-to-back terminal block system.
The hanging of the fixture in the ceiling is simple with the use of Milwaukee’s integrated wire cable and connector snap-in fittings.
The 2155 is a substantial and more rugged mounting system than I am used to seeing on a construction site.
while I doubt you'll break its polycarbonate lens, it is replaceable, and it the entire unit weighs only 7.7lbs.
I know the 2155 can take much more wear and tear and stay in place than ordinary temporary lighting installations.
No more busted bulbs and warm-up times. And these lights can be removed, stacked, stored and transported without fragile bulbs to worry about.
Our site had Metal Halide and incandescent string lights mixed in.
When careless lift operators run into either of these installations,
the electrician has to remove, replace the bulbs and then rehang.
One of the aspects of temporary site lighting is the cost.
We often use the cheap plastic enclosed incandescent string lights.
Clearly, these types of cheap strings are less expensive to purchase than a high quality 2155 LED fixture.
But the 2155 is substantially brighter and will require fewer lights in an open construction floor area.
Also, the 2155 runs cooler, ramps up faster, and uses less electricity than an incandescent bulb.
For example:
the LED light runs at 70 watts, and puts out 7000 lumens, which is equal to a 105 watt fluorescent bulb.
The LED array on this light is rated to last 50,000 hours.
In the Pipefitters training center high-bay areas, the electrical contractor was using a system of 400 watt metal-Halide high-bay fixtures.
These fixates put out 36,000 lumen ad are supposed to last 15,000 hours. At 7500 hours [if it lasts that long] a metal halide light has lost half of its lumens.
So it real-use lifetime is far less than that - probably somewhere in the vicinity of 5,000 hours "useful lifetime."
But lets not forget the horrible lighting "ramp up time," or that one bump, or overspray from fire proofing, and this bulb is gone.
In this case, the relative cost difference in the initial fixture costs is minimal, if not in favor of the Milwaukee 2155.
Change one high-bay metal halide bulb, due to job site wear and tear and the scale is definitely in favor of the Milwaukee fixture.
We all know that a construction environment can be brutal on lighting. I also liked the LED light output of the 2155.
In a room with two incandescent temp lights, I measured the illumination level at workbench height right below one of the lamps at 25.7 lux.
In the adjacent room with one 2155 fixture, I measured the light intensity at 623 lux. Clearly, the intensity of the 2155 is far superior.
In summary, the LED Lighting experiment with the 2155 fixtures was an overwhelming success. We installed the fixtures in a very short time, the installation is safer, more robust, virtually eliminates on-site maintenance, and the light quality is superior.
In comparison to high-bay temporary lighting installations, the Milwaukee 2155 is at par or better over the life of the project.
I don't know about you, BUT I feel enlightened!!
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