Electric-Light
Senior Member
I am surprised that Lithonia does not append engineering revision change as a suffix and a change in UPC. It is VERY important to ensure that the installed units do not possess inferior specifications than the spec requirements or agreed upon performance.
So, here's a new strategy I'm going to keep for myself. Normally, something like
"shall be Lithonia xx yy model, or equivalent" indicates that exact model # match is automatically accepted as conforming, but this NEEDS TO CHANGE. There needs to be an additional qualifier: performance rating of the specific engineering revision shall not be inferior to the originally specified model. Modification between revisions shall not cause visually objectionable effect, such as uneven brightness or color against existing installed units.
Before placing an order, I now suggest getting a signed applicable brochure version, and an older edition as well for reference. Scrutinize the incoming shipment with a fine comb and make absolutely certain that the shipment you receive do not fall under the older spec set that fail to meet the specifications that you agreed to accept.
Reference: A basic SB2 F32T8 Lithonia wrap around is 92.1% rated.
http://www.visual-3d.com/tools/photometricViewer/default.aspx?id=40829
F32T8/RE835 rated at 2950 new 2800 mean.
0.78 L ballast rated 48W input.
4240 lm / 48 88.33 lm/W using LED industry method, which uses new out of box lumens.
4024 lm / 48 = 83.8 lm/W using the standard method, which uses mean lumens.
Lithonia makes wrap arounds that looks almost identical to the above, but uses LEDs instead of T8 lamps. This is where it gets scary. They change specs wildly between revisions, but fail to list serial number ranges where the old spec sheet applies to.
So, say you go to Lithonia.com and finds the datasheet:
Same UPC #.... different production revision, HUGE difference.
Huge meaning that it makes enough difference for the old version to be considered inferior to standard T8 wrap around and new revision to be considered a slight update over T8.
Newest:
LBL4 LP835 LBL4 LP835 UPC: 753573917601 rated at 4564 LM, 41W 3500K and L90/60,000 hours. With a 111.3 LM/W initial and (speculated life of L90/60,000 hours of use)
So,the specs show the efficacy at end of life is 100 LM/W
This would be slightly better than the T8, taking the specs at face value.
So, if you were to start shopping for the fixture by the model and UPC... and seek the best pricing on them Well. You might find a great deal on the same model with the same UPC, but that could be because of an outdated revision old stock that is crushed by the T8 version. Lithonia fails to disclose applicable serial number ranges, you may get a substandard non-complying products:
Year and half ago: 12/9/2013
LBL4 LP835 753573917601 4' LED Wraparound 4,000 LM 50W 3500K speculated life of (30% light loss after 50,000 hours of use L70/50,000)
80 LM/W starting and end of life efficacy of 56 LM/W
This version is worse performing than T8 fluorescent.
Same model #, same UPC, such a dramatic difference. This shouldn't be allowed :happysad:
If you purchase a retrofit based on the favorable looking specs from the 4/27/2015 specs, but you find out that fixtures actually installed are from production lots prior to the kick-in of the new specs, then you know you've got old stuff dumped on you you should have them ripped all out and replaced with the conditions that payments are due upon completion... to the originally agreed upon specs.
So, here's a new strategy I'm going to keep for myself. Normally, something like
"shall be Lithonia xx yy model, or equivalent" indicates that exact model # match is automatically accepted as conforming, but this NEEDS TO CHANGE. There needs to be an additional qualifier: performance rating of the specific engineering revision shall not be inferior to the originally specified model. Modification between revisions shall not cause visually objectionable effect, such as uneven brightness or color against existing installed units.
Before placing an order, I now suggest getting a signed applicable brochure version, and an older edition as well for reference. Scrutinize the incoming shipment with a fine comb and make absolutely certain that the shipment you receive do not fall under the older spec set that fail to meet the specifications that you agreed to accept.
Reference: A basic SB2 F32T8 Lithonia wrap around is 92.1% rated.
http://www.visual-3d.com/tools/photometricViewer/default.aspx?id=40829
F32T8/RE835 rated at 2950 new 2800 mean.
0.78 L ballast rated 48W input.
4240 lm / 48 88.33 lm/W using LED industry method, which uses new out of box lumens.
4024 lm / 48 = 83.8 lm/W using the standard method, which uses mean lumens.
Lithonia makes wrap arounds that looks almost identical to the above, but uses LEDs instead of T8 lamps. This is where it gets scary. They change specs wildly between revisions, but fail to list serial number ranges where the old spec sheet applies to.
So, say you go to Lithonia.com and finds the datasheet:
Same UPC #.... different production revision, HUGE difference.
Huge meaning that it makes enough difference for the old version to be considered inferior to standard T8 wrap around and new revision to be considered a slight update over T8.
Newest:
LBL4 LP835 LBL4 LP835 UPC: 753573917601 rated at 4564 LM, 41W 3500K and L90/60,000 hours. With a 111.3 LM/W initial and (speculated life of L90/60,000 hours of use)
So,the specs show the efficacy at end of life is 100 LM/W
This would be slightly better than the T8, taking the specs at face value.
So, if you were to start shopping for the fixture by the model and UPC... and seek the best pricing on them Well. You might find a great deal on the same model with the same UPC, but that could be because of an outdated revision old stock that is crushed by the T8 version. Lithonia fails to disclose applicable serial number ranges, you may get a substandard non-complying products:
Year and half ago: 12/9/2013
LBL4 LP835 753573917601 4' LED Wraparound 4,000 LM 50W 3500K speculated life of (30% light loss after 50,000 hours of use L70/50,000)
80 LM/W starting and end of life efficacy of 56 LM/W
This version is worse performing than T8 fluorescent.
Same model #, same UPC, such a dramatic difference. This shouldn't be allowed :happysad:
If you purchase a retrofit based on the favorable looking specs from the 4/27/2015 specs, but you find out that fixtures actually installed are from production lots prior to the kick-in of the new specs, then you know you've got old stuff dumped on you you should have them ripped all out and replaced with the conditions that payments are due upon completion... to the originally agreed upon specs.
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