MossRoad
Super Moderator
- Joined
- Aug 31, 2001
- Messages
- 66,110
- Location
- South Bend, Indiana (near)
- Tractor
- Power Trac PT425 2001 Model Year
Everybody disparages lawyers.... until they need one. 
GE and Sylvania make up the bulk of what I have.
I’m a fan of T8 and we were the first major build in the city all T8 and compact Florescent.
In 30 years only one single compact Florescent ballast went bad…
In 30 years had a few short lived ballasts the first year and then the sweet spot for 15 or so years and the to now 3-4 ballasts a month..
I’m guess my medical halogen surgical bulbs will soon disappear…
I’m looking at $140k to replace with LED in 6 operating rooms…
People wonder why medical costs so much?
Just an FYI...Fluorescent lighting is surprisingly efficient - typically 50-100 lumens per watt.
Of course, LEDs are more like 130 lumens per watt, so they're even more efficient.
One source gives 21.5W LED retrofit for T8 at 172 lumens per watt.
Incandescent lighting is more like 15 (5-20 range).
Personally I get eye strain and headaches in fluorescent-lit spaces that I haven't noticed elsewhere. I suspect my pupils don't react to the wavelengths so my eyes let in too much light and get overloaded, but it could also be the 60Hz flickering which is pretty obvious. I've replaced CFLs and T8s while they're still otherwise functional because of color temp and flicker; when possible I've used the "remove/bypass the balast" type replacements but I understand not doing that to replace an entire hospital's lighting...
On one side of the aisle, anyway. On the other is usually someone who's just been broadsided.Clients are almost always the slimiest people in the courtroom.
My then pregnant sister in law was T-boned when a UC Berkeley student ran a red light.Everybody disparages lawyers.... until they need one.![]()
PGE has offered programs and I was approved for parking lot lighting and then PGE filed bankruptcy… every year come new fires so it’s sketchy at best.I’ve done multiple large upgrade lighting projects to LED, using the help of utility company reimbursement programs. Probably aren’t as many anymore, but I would still check. Combined with the energy savings, the payback is relatively short.
The very good ones I had been getting were superseded so my recent option for the 3500k is 85 CRI and 2925 lm.With LED lighting, beware of low color rendition index (CRI) and/or too high of a color temperature. Often, in order to get a high lumen-per-watt number, the CRI is sacrificed and the color temperature in the blinding blue light territory. I prefer the warmer light output, but not too yellowish like some warm LEDs can be. The technology is still progressing.
There is also a question of maintaining UL listing for altered fixtures…Fluorescent lighting is surprisingly efficient - typically 50-100 lumens per watt.
Of course, LEDs are more like 130 lumens per watt, so they're even more efficient.
One source gives 21.5W LED retrofit for T8 at 172 lumens per watt.
Incandescent lighting is more like 15 (5-20 range).
Personally I get eye strain and headaches in fluorescent-lit spaces that I haven't noticed elsewhere. I suspect my pupils don't react to the wavelengths so my eyes let in too much light and get overloaded, but it could also be the 60Hz flickering which is pretty obvious. I've replaced CFLs and T8s while they're still otherwise functional because of color temp and flicker; when possible I've used the "remove/bypass the balast" type replacements but I understand not doing that to replace an entire hospital's lighting...
I did tons of two tube 8’ T12 fixtures to 8’ twin T8 conversions, with a roughly 40% utility reimbursement program, then about 10 years later the same program to replace the T8’s with LED. 8’ LED’s are hard to find, and the utilities know it so offered a good 40% program on replacing replacement of the entire twin tube fixtures to LED fixtures made for using four common inexpensive 4’ LED “tubes”. I just had to meet certain efficiency standards. I had some extra labor dismantling all the old fixtures, separating the metal, magnetic ballasts, electronic ballasts, and wiring.There is also a question of maintaining UL listing for altered fixtures…
I agree with everything EXCEPT i never leave a ballast. Never.Fluorescent lighting is surprisingly efficient - typically 50-100 lumens per watt.
Of course, LEDs are more like 130 lumens per watt, so they're even more efficient.
One source gives 21.5W LED retrofit for T8 at 172 lumens per watt.
Incandescent lighting is more like 15 (5-20 range).
Personally I get eye strain and headaches in fluorescent-lit spaces that I haven't noticed elsewhere. I suspect my pupils don't react to the wavelengths so my eyes let in too much light and get overloaded, but it could also be the 60Hz flickering which is pretty obvious. I've replaced CFLs and T8s while they're still otherwise functional because of color temp and flicker; when possible I've used the "remove/bypass the balast" type replacements but I understand not doing that to replace an entire hospital's lighting...
Im not sure how we get by altering the innerds of light fixtures the way we do. By cutting out the ballast and installing direct wired led tubes, we have definitely altered the ul rating. Bit as ling as we install the sticker alerting to the change, i have never had an issue with this with an inspector. Ive even had inspectors hire me to swap out their shop lightingThere is also a question of maintaining UL listing for altered fixtures…
Nearly all the projects I have taken on in lighting conversion (commercial or industrial) was paid for by utility companies. They came thru every time and paid in full. Most times these plans covered all parts and labor, except for a few jobs where labor hours were higher due to exposure or vapor enclosed lighting. On those the company paid the difference. Even covered most scissor lift rental and disposal feesPGE has offered programs and I was approved for parking lot lighting and then PGE filed bankruptcy… every year come new fires so it’s sketchy at best.