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Re: Joining the 21st century
Posted: Mon Jun 27, 2016 9:24 pm
by garys
Ed in Tampa wrote:Isn't lumens the measure of the amount of light produced.
If you have two lights one 2000k and one at 6000k but both producing the same number of lumens won't they be the same brightness? I understand one's eye might preceive one brighter than the other but isn't the fact they are the same lumens saying they are the same brightness?
Does a spot/flood light produce more light to specific area over a tube light?
Yes, lumens is the measure of light, but the problem with that is the measurement is taken with a light meter which doesn't see light like the human eye. The human eye sees white/blue light the best and yellows much less, and reds are the worst.
High pressure sodium lights have very high lumen ratings, but are very poor for the human eye in the dark.
Re: Joining the 21st century
Posted: Mon Jun 27, 2016 10:22 pm
by ERLover
garys wrote:Ed in Tampa wrote:Isn't lumens the measure of the amount of light produced.
If you have two lights one 2000k and one at 6000k but both producing the same number of lumens won't they be the same brightness? I understand one's eye might preceive one brighter than the other but isn't the fact they are the same lumens saying they are the same brightness?
Does a spot/flood light produce more light to specific area over a tube light?
Yes, lumens is the measure of light, but the problem with that is the measurement is taken with a light meter which doesn't see light like the human eye. The human eye sees white/blue light the best and yellows much less, and reds are the worst.
High pressure sodium lights have very high lumen ratings, but are very poor for the human eye in the dark.
I use my Nikon camera F stop a lot to measure light, not color tone but light/Lumens, it tells me what light is there, and available.
Re: Joining the 21st century
Posted: Mon Jun 27, 2016 10:39 pm
by Gene Howe
Thanks to all for all the good info and personal experiences.
My finishing is not done in the shop. The finishing room has an abundance of natural light
So, I'm assuming those 6000K tubes will give me considerably more light where the cuttins done. Which is really all I want.
You guys have been a great help.
Thanks again.
Re: Joining the 21st century
Posted: Tue Jun 28, 2016 6:41 pm
by roy_okc
Re: Joining the 21st century
Posted: Tue Jun 28, 2016 8:56 pm
by retiredsoldier919
Ed in Tampa wrote:I have been studying changing from fluorescent lights to LEDs . I have found three ways.
1. New fixtures that are LEDs.
2. Buy LED replacement tubes that use existing fixture ballast.
3. Buy Led tubes that use the existing fixtures tombstones but does away with the ballast.
I have found these 3 options in most temperature ranges. Cost are similar for the tubes but new fixtures add to cost.
I like the idea of doing away with the ballast because I have few fixtures that have iffy ballast.
My concern is do I want fluorescent type fixtures or would I be better served going to LED flood type fixtures. Back in the day fluorescent type fixtures made sense but if I'm going to convert to LEDs spots/floods may be a better method.
Any thoughts ideas experience?
I use these lights for focused lighting. Very affordable and you can epoxy a magnet for attaching to machinery.
http://m.ikea.com/us/en/catalog/products/art/40315673/
Re: Joining the 21st century
Posted: Tue Jun 28, 2016 10:22 pm
by garys
Those appear to have non-replaceable lamps. I wouldn't buy anything like that. Yes, they rate them for 50,000 hours, but my experience with LEDs is like with anything electronic. Not all of them will reach 50,000 hours. Some will blow out in 500 or 1000 hours, and if you can't replace the bulb, you lose the entire fixture. By that time you won't be able to get a matching one so you end up spending too much for a new fixture and have a mis-matched one with your other ones.
I've had LED bulbs blow out after only a few months of use while other ones like them run and run and will likely reach their rated life.