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T8 Versus T12 The T8 is on the left with 3500K Philips Alto II lamps and the T12 is on the right with cool white GE made Doit lamps on a full power ballast. the T12s are a tad brighter but not by much. Keywords: Lit_Lighting

T8 Versus T12

The T8 is on the left with 3500K Philips Alto II lamps and the T12 is on the right with cool white GE made Doit lamps on a full power ballast. the T12s are a tad brighter but not by much.

gol961307.JPG DSCF0044~0.JPG gol4713_003.JPG gol4613_004.JPG P9050549.JPG
File information
Filename:gol4713_003.JPG
Album name:Mike / My Collection
Keywords:Lit_Lighting
Filesize:176 KiB
Date added:Apr 07, 2013
Dimensions:2048 x 928 pixels
Displayed:123 times
Color Space:sRGB
DateTime Original:2009:03:26 21:51:54
Exposure Bias:0 EV
Exposure Mode:0
Exposure Time:1/31352 sec
FNumber:f/2.8
Flash:No Flash
Focal length:28.8125 mm
Light Source:Unknown: 0
Make:Vivicam
Model:V5024
URL:http://www.galleryoflights.org/mb/gallery/displayimage.php?pid=15395
Favorites:Add to Favorites

Comment 1 to 9 of 9
Page: 1

A_lights   [Apr 09, 2013 at 02:46 AM]
The T8s are triphosphor and the T12s halophosphate , i think a more accurate comparision would be with the same color temp T8 &T12s with the same CRI, but cool experiment anyways Cool
streetlight98   [Apr 09, 2013 at 10:16 AM]
i used cool white halophosphate since that's what the T8 will be replacing so i needed to know how close it was.
GEsoftwhite100watts   [Apr 10, 2013 at 03:53 AM]
Did the T12 lamps you used lack the (E) logo and weren't 34w? Otherwise they were haophosphate, FYI. Cool experiment anyway!
streetlight98   [Apr 10, 2013 at 11:01 AM]
(...) look here...[/irl]
GEsoftwhite100watts   [Apr 10, 2013 at 03:12 PM]
Uhh your link didn't come out right...
streetlight98   [Apr 10, 2013 at 06:49 PM]
it was the pic of the doit lamps. well, anyways, yeah the do it lamps are 40W and have both the Hg and E logos on them.
GEsoftwhite100watts   [Apr 11, 2013 at 01:13 AM]
So those are triphosphor but it's a good comparison anyway since that's what modern T12s are (like what a fixture in a lighting setup retrofitted to TCool would probably have by now (halophsphate tubes made before 1995 long since burned out).
streetlight98   [Apr 11, 2013 at 01:59 AM]
yeah the tubes in the preheater at my mom's dad's shop are newer pre-eco lux 40W GEs. possibly residential grade... the industrial f40 rapid start fixtures in my dad's parents' house still have True Value tubes which are liekly halophosphate since they're a bit greener than the lamps i see today. almost like an old /DX merc.
GEsoftwhite100watts   [Apr 11, 2013 at 02:08 AM]
Yep those are halophosphate for sure. Anything with the "F40CW" ordering code and no (E) logo are halophosphate...s

Comment 1 to 9 of 9
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