jimbo231
Enlightened
Can anyone tell me the differences between the two and which is brighter?
Cree L2 v.s MCE
- Thread starter jimbo231
- Start date
mds82
Enlightened
what is a Cree L2 ?
Marduke
Flashaholic
Since there is no Cree L2, I'm going to guess you are looking at the Solarforce L2 with XR-E, and some other light with MC-E?
More details required...
More details required...
Gunner12
Flashaholic
You'll need to provide more details.
Cree is a company that produces LEDs. MC-E is one of the LEDs produces by Cree. It is a quad EZ1000 die LED. Cree does not have a product called L2 from what I know.
:welcome:
Cree is a company that produces LEDs. MC-E is one of the LEDs produces by Cree. It is a quad EZ1000 die LED. Cree does not have a product called L2 from what I know.
:welcome:
Linger
Flashlight Enthusiast
We can add a little more to that - any emiter is only part of the story.
What current is it driven at? The driver and power supply (batteries) are also important.
The mc-e is a quad-die led. This means it has 4 emitters together, so it has the potential to emit more light if it is given more power.
But if the drive current is the same, which will be brighter is a function of efficiency. The new xpg r5 is more efficient than the mc-e and so if both were driven 500ma @3.5v, the more efficient xpg would put out more light. But if you wanted to know which has the brightest possible maximum output the answer is different.
What current is it driven at? The driver and power supply (batteries) are also important.
The mc-e is a quad-die led. This means it has 4 emitters together, so it has the potential to emit more light if it is given more power.
But if the drive current is the same, which will be brighter is a function of efficiency. The new xpg r5 is more efficient than the mc-e and so if both were driven 500ma @3.5v, the more efficient xpg would put out more light. But if you wanted to know which has the brightest possible maximum output the answer is different.
Last edited:
jimbo231
Enlightened
Sorry, I meant R2. I mean which is better or brighter, given the same input to each? Say 2 AA's.
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Marduke
Flashaholic
R2 is a flux bin, not a model.
Again, more info is needed. The model and flux bin of each led is needed to compare the two accurately.
You may want to read the Welcome Mat.
Again, more info is needed. The model and flux bin of each led is needed to compare the two accurately.
You may want to read the Welcome Mat.
the Cree XR-E (bin "R2") is a led with one emitter die,
the MC-E is a package that houses four emitter die in one package.
The "rugged" view were:
the emitter die are the same (at least same enough that a difference is only measurable).
So - with the same power - there is barely any difference
with the right power (MC-E four times the one of the XR-E), the MC-E is much brighter
the MC-E is a package that houses four emitter die in one package.
The "rugged" view were:
the emitter die are the same (at least same enough that a difference is only measurable).
So - with the same power - there is barely any difference
with the right power (MC-E four times the one of the XR-E), the MC-E is much brighter
Gunner12
Flashaholic
R2 is a flux (output) bin of LED, not the model. Though different models with the same flux bin should have the same output, it is best to state both the model and output bin for clarification. What flux bin of the MC-E are you comparing the R2 bin to?
Instead of specifying a battery type (AA) it would be better to specify an input current. Because different chemistries of batteries can drive things differently. For example, an alkaline has trouble holding capacity at high currents, while lithiums and rechargeable will have much less trouble at the same current.
Better is very subjective. If you are just asking for what is better, there is a small chance of you getting the answer you want. You have to specify what is better to you.
As for output, since the MC-E has 4 dies vs the XR-E/XP-E's 1 die (lets presume both are of the best flux bin), the MC-E would be more efficient then the R2 for a specific drive current. But because of the larger emitting area, the MC-E also will have a wider and less intense hotspot if used with the same reflector.
Instead of specifying a battery type (AA) it would be better to specify an input current. Because different chemistries of batteries can drive things differently. For example, an alkaline has trouble holding capacity at high currents, while lithiums and rechargeable will have much less trouble at the same current.
Better is very subjective. If you are just asking for what is better, there is a small chance of you getting the answer you want. You have to specify what is better to you.
As for output, since the MC-E has 4 dies vs the XR-E/XP-E's 1 die (lets presume both are of the best flux bin), the MC-E would be more efficient then the R2 for a specific drive current. But because of the larger emitting area, the MC-E also will have a wider and less intense hotspot if used with the same reflector.
