Cris Bessette wrote:Christmas LED strings generally do not use any rectification, they simply put the LEDs in series to drop the current and run them on AC
(The LEDs are only on during the positive going cycle, thats why you can see a 30hz flicker)
bruce Fine wrote:is there such a thing as a led heat lamp that can keep chicks alive?
Inge Leonora-den Ouden wrote:Hi Cecile. I do not know very much on electric lights/lamps, and there is much I do not understand about them. But I do know 4000 lumen is a lot of light! In my opinion that's much more light than you'll need.
OK, if you have your socket on the ceiling and you want to read fine print next to the floor, maybe. But I think it's better to have the socket not at the ceiling. When you have your light source close to where you work or read, you need much less light. I don't think you can add up the lumen of three light bulbs (as far as I know it's always 'lumen' without an s, at least it is in my language). Three light bulbs of 4000 lumen will use three times the electricity (Watts, KiloWatts/hour) and give 4000 lumen of light in three different directions, if I understand well ...
Cécile Stelzer Johnson wrote:......
You can put them in garages, which are usually not heated, so I expect that it would light up immediately in spite of the cold? [Big plus in Wisconsin zone 4b]
Garo Gagliano wrote:
If a plant requires a CRI 100 bulb - a light source that produces the entire spectrum including those that cannot be seen by the human eye - to grow and thrive healthily, then why would it be any different for humans? Seriously, does the plant need to visually 'see' the ranges of the spectrum that are invisible to us in order for them to be affected by them. NO.
Then, why would we not also benefit from these wavelengths. You cannot normally visually see heat, and yet it affects you. You cannot see flickering of florescent lamps if at high rates, but it affects you. You cannot see sound vibrations, yet it affects you. I would guess that all the wavelengths of any radiation hits your entire body, and there is an affect, whether you can really 'see' the wavelengths or not.
But, in the case of our daily lighting needs, the impact could be even more huge, as we - like the plant - may not really be absorbing the wavelengths that, much like the Sun, the CRI 100 incandescent bulbs provide. I mean, there is enrichment of our existence, and then there are the basic needs of that existence. Lighting is a very base need.
At this time in our history as a species thriving on the 3rd planet of Sol system, in a slow orbit roughly half-way from the center of the Milky Way galaxy, 5 new souls are born into this Universe, on Earth every second now, and 2 die. The rate of increase is only going to grow and accelerate now, moving into the future of mankind. As a result ultimately, for the large majority of people, our value per unit will go down, while our expendability continues to rise.
Am I being stupid? lol Sure, we are not plants. But we ARE alive. And we are energy, more than anything, in the form of vibration, solidified from our perspective. But, not so solid when you get right down to it scientifically. And there ARE effects when we are deprived of those 'invisible' wavelengths for too much time.
Skandi Rogers wrote:"heating" with a light-bulb would be truly stupid where I am, not only is it up near the ceiling where I don't feel it but electric is more expensive than fuel for the boiler even taking into account the efficiency of the boiler and the 7W an 100W equivalent LED uses it's still cheaper to buy fuel for the furnace for heat and use LED's for light. And how about the few months of the year when it's summer and I don't want any extra heat? No LED's are better for daily use in a house in my opinion.
Julia Gulbrandson wrote:One more reason to add LEDs to the naughty list… they increase the risk of migraine headaches. With migraines affecting so many people and knowing fluorescent lights can cause migraines, it should be a no brainer for doctors and manufacturers to realize the impact of LEDs on migraine sufferers. I’m finding mine getting worse and found out today from my chiropractor that LED lights could most likely be the cause. I knew about blue light issues but didn’t know that most LED lightbulbs are blue light and red light (also bad for migraines). Therefore, we need doctors, the migraine societies, and others to pushback at these manufacturers. I’m going to start looking for and buying long-life incandescent bulbs. And there are several studies that focused on and proved LED effects on migraine sufferers. Thank you for sharing this information. Julia
paul wheaton wrote:
Steven Kovacs wrote:Thanks for this, Paul. You've clearly put a lot of thought into the issue.
More like: my brain is infested with a huge amount of thoughts on a lot of topics. Lovely people then ask a simple question like "What do you think of LED lights these days?" and I am instantly tongue tied because my answer is not a simple "I still prefer incandescent." My answer is huge. In fact, my answer is even larger than what I provided, but I need to stop at some point.
It's exactly the same and completely different as this tiny ad:
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