nfhiggs
Well-Known Member
You have it backwards. Red photons have a lower energy level than blue photons, and take less energy to create.I was implying that the blue spectrum takes less energy to produce a photon than the red spectrum does.
You have it backwards. Red photons have a lower energy level than blue photons, and take less energy to create.I was implying that the blue spectrum takes less energy to produce a photon than the red spectrum does.
I stand by my statement that running the 301B at the same current as the 561C does not equate to running half the number of diodes. If you run the diodes at the same current there is no gain of 50% less diodes needed.Running at the same current is not the same as running them at the same *efficacy*.
You are correct and I was mistaken.You have it backwards. Red photons have a lower energy level than blue photons, and take less energy to create.
My numbers are wrong? I didnt post any numbersYour numbers are wrong. You are not running at the same current.
I dont know how to get a screen shot here but mine are totally different. When run at .125 amps I show the 561C with 288 diodes running almost the same as 273 301B diodes.
At .150 amps the 561C with 288 runs close to the 301B with 273 diodes.
And at 288 diodes again for the 561C the 301B needs 271 diodes when run at .175 amps.
All these numbers are with in a few lumens of each at the numbers. These are 3000K S6 and SK flux, 80 CRI, VF AY. The same as you listed.
Of course. Running them at the same current/wattage and running half as many leds for the same output would actually be impossible. The 301b would need to be around 115% efficient to do that. Generally there are a couple of ways to increase efficiency. Better leds (lm301b) or reduce the current you are running the leds(by using more leds and driving them softer) that was what I am referring to.I stand by my statement that running the 301B at the same current as the 561C does not equate to running half the number of diodes. If you run the diodes at the same current there is no gain of 50% less diodes needed.
In your screen shot you did.My numbers are wrong? I didnt post any numbers
Where show meIn your screen shot you did.
You are right I clicked you instead of NFhiggs. Your post was small and right below his.Where show me
That was not the claim that was made:I stand by my statement that running the 301B at the same current as the 561C does not equate to running half the number of diodes. If you run the diodes at the same current there is no gain of 50% less diodes needed.
Hey why dont you go back and read were I said that we were comparing two different things?That was not the claim that was made:
"You would need 2x as many 561C to match the efficacy." was the statement Stephen made.
As the simulator clearly shows running them at the same efficacy requires considerably fewer of the 301B diodes to produce the same output. Not quite half, but pretty damn close when you use real world temperatures of 60C or so.
The numbers I was originally talking about where from test data directly from Samsung themselves. Unfortunately, we can't share internal stuff but the future is bright(Pun Intended). As I have stated our price for the QB288 will be the same with V2 using 301B.In the end the thing that really matters is price. If you can buy a led strip with 288 LM561C SMDs for $50 vs a board with identical performance but then from 185 LM301B for $75, then who cares about the efficacy of the individual SMD's? Either you keep the money in your pocket, or you could buy more strips and get a higher efficacy.
BTW I wouldn't trust that simulator too much. Especially not using LM301B data. 4000K and 5000K numbers are identical and 3500K numbers are way too high (look more like 4000K). If they are screwed up that much, who knows what else they got wrong.
Are you going to make 301B versions of the other layouts such as the QB132 and the QB96?The numbers I was originally talking about where from test data directly from Samsung themselves. Unfortunately, we can't share internal stuff but the future is bright(Pun Intended). As I have stated our price for the QB288 will be the same with V2 using 301B.
More than likely yes. Once our line is in we will change quite a bit over. S7 561C will eventually happen as well.Are you going to make 301B versions of the other layouts such as the QB132 and the QB96?
I'd like to see the QB96 narrowed to 50 mm from 65. Then it would be a perfect fit on the 2.079 profile from Heatsink USA. Maybe even add a third row of diodes down the center.... Hint Hint.More than likely yes. Once our line is in we will change quite a bit over. S7 561C will eventually happen as well.
I hope so. i would like to see a few tweaks to some of the QB designs. But the QB120 and QB132 are REALLY nice if you cover your canopy with them. My biggest gripe is with the QB288/304. They're too small for how much light they output. You could theoretically cover your entire canopy with qb288s, but your wallet wont like that.What about the QB120, are you going to make more of them, with any diode?
I have the drivers sitting for months now.
Yes, we will be making more 120/132s. Samsung has secured our supply chain of LEDs and we will have our line installed in 4-6 weeks. Maybe even sooner. Once we have that our stock issues should be a thing of the past.What about the QB120, are you going to make more of them, with any diode?
I have the drivers sitting for months now.