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Looks like model is SL-48401-50 Maxlite claims 104 lm/W for this model -- that's low for LED, but much higher than the average 4ft fluorescent tube can deliver.Uses more wattage as two fluorescent bulbs with half the lumens, what am I missing?
I'm pointing out the difference between "...produces 75% less light per fixture..." and "...produces 75% as much light per fixture..."You’re correcting me on a rounding error?
Since you asked, this specific product is so you can buy the entire light fixture for the cost of two fluorescent tubes, it's not a conversion kit. I have no idea why you guys are arguing about the efficiency of lighting technology that use almost no energy and last almost forever.Ok... irregardless of semantics I don’t see enough benefit to swap out my existing shop lights just yet. When LED matches the light output for less energy consumed I will revisit. Until then, I don’t see the point?
You're not going to find LED tubes matching the light output of fluorescent at this price point.Ok... irregardless of semantics I don’t see enough benefit to swap out my existing shop lights just yet. When LED matches the light output for less energy consumed I will revisit. Until then, I don’t see the point?
"Equivalent Wattage 2x32W T8", Delivered Lumens (lm) 4144.0, Power Consumption (W) 40.0
Philips F32T8 TL830 ALTO, Design Mean Lumens 2800 Lm @ 32 watts x 2 which is 5600 at 64 lumens.
While I agree the LED is slightly more efficient (84% fewer watts required per lumen), it actually produces 75% less light per fixture so.... back to my original question: What am I missing?
What’s wrong with you?.....wow i started a fight by posting cheap led fixtures?
Ok... irregardless of semantics I don’t see enough benefit to swap out my existing shop lights just yet. When LED matches the light output for less energy consumed I will revisit. Until then, I don’t see the point?
wow i started a fight by posting cheap led fixtures?
Looks like model is SL-48401-50 Maxlite claims 104 lm/W for this model -- that's low for LED, but much higher than the average 4ft fluorescent tube can deliver.
Where are you finding LED fixtures that are getting much more than 100 lm/W? Do any exist that are both better than 100lm/watt and warmer than 4,000K? I'm partial to 2,700 or 3,000K, colors look better, which matters if you're tracing wires in a wiring harness.
CRI is pretty important too, but I'm pretty sure that there are no shop lights that have a CRI above 85.
For Edison base bulbs 100lm/watt is pretty good.
Delivered lumens are the key to getting the certifications needed to qualify for certain commercial rebates. I've seen a lot of facilities tearing out the entire flourescent fixtures and just scrapping them because the ROI on switching to LED is that much better with the subsidies on offer.What you're missing is fluorescent tubes emit light 360 degrees and rely on the reflector portion of the fixture above the lamps to reflect the light output from the top half out and away from the fixture. White painted reflector maybe 85% efficient at best and the majority emitted winds up trying to pass back through the lamp/lamps. LED's are directional and basically emitting from the underside (120 degrees) of the lamp so getting 100% of available lumen output up on the workplane where it's needed.
The purpose-built commercial "low bay fixtures" can be extremely efficient, e.g. anything certified as DLC Premium is +125 lm/W (almost always 5000K)Where are you finding LED fixtures that are getting much more than 100 lm/W? Do any exist that are both better than 100lm/watt and warmer than 4,000K?
”All outrage, all the time” channel.f*** you and your witty observation!
You must be new here.... people will fight about anything.
Delivered lumens are the key to getting the certifications needed to qualify for certain commercial rebates. I've seen a lot of facilities tearing out the entire flourescent fixtures and just scrapping them because the ROI on switching to LED is that much better with the subsidies on offer.
The purpose-built commercial "low bay fixtures" can be extremely efficient, e.g. anything certified as DLC Premium is +125 lm/W (almost always 5000K)
Maxlite, the same firm behind the cheap Ocean State fixtures, also makes commercial fixtures -- at about 10x the price of this deal.
I do a lot of work in data centers so I see a literal ton of fluorescent fixtures being discarded -- when cooling is a big part of your expenses, losing light energy as heat is doubly wasteful.Bingo and why we have DLC.
Are you in the business?