So a Cree CXB3590 COB LED chip can be run as high as 110W. This is its nominal rating. Running it this way will result in efficiency of about 45%. Running it at 50W returns 56% efficiency, but uses twice the number of chips at fifty dollars each. Going even further, running the same chip at 23W gives 64% efficiency! ...at the up front cost of twice again the number of chips. What the user wants determines the efficiency vs cost level that makes most sense to them.
I understand what you mean! But efficiency is a vague concept still...
Efficiency as in converting electricity to photons. 100 watts of 45% efficient light gives 45 watts of light, rest is heat. So, the higher the efficiency is, the less power you have to use for usable light
Thanks! that was understandableEfficiency as in converting electricity to photons. 100 watts of 45% efficient light gives 45 watts of light, rest is heat. So, the higher the efficiency is, the less power you have to use for usable light
But why would not everyone go for 100% efficiency? Only because of cost reduction? (buying fewer leds?) I mean, the way i see it... going for 100% efficiency is a higher investment, but pays out in the long run rite? 100% efficiency is impossible. it would mean there is no loss converting electricity to light. Impossible in the real world.Thanks! that was understandable
Yeah what i meant was, as near as possible
But what i am trying to understand is, if i want to build a equivalent of 1200 watts HPS, how can i calculate what i need?
You'd be absolutely amazed at just how close we come to to 'perfect' or 'ideal' these days. It just takes creative thinking... or brute force, lol
'About a pound'Yeah what i meant was, as near as possible
so if I create a perfect ball, perfectly round with no surface imperfections how long will it roll on a perfectly flat surface that also has no surface imperfections ? If its perfect with no friction it will roll forever and ever.
Air resistance and oil film friction will slow it down. Just gotta account for all factors...
exactly lesson is cannot convert energy at 100% in the real world, which means 100% efficiency while a target can never be met.Air resistance and oil film friction will slow it down. Just gotta account for all factors...
.
are you dumb or what 100% in the real world is impossible. there will always be some loss.
When I was graduating, this was an exciting new field of research and Colorado State University's engineering department was- and remains- at the leading edge of research.
I just answered this. You need to give modern physics and engineering some credit, bro.
yeah that's cool, love to see 99% efficient, but don't forget to take into account what it takes to get there.
how do you expect to achieve 100% efficiency. its basic laws of physics which says its impossible.
Read what I wrote carefully; I said that while exactly 100% efficiency is often impossible, getting so close as to be practically indistinguishable for the purpose at hand is certainly not. That's not beating 100%, it's finessing it!
that statement is wrong. its impossible all the time
This got started back when I said people are going to figure out ways to use LED chips at very high efficiencies.