GHL Mitras Club
- Thread starter rodneyri
- Start date
AQD_ottawa
New member
Units that have had lab tests done on the them typically had been running for long period, the results have always been consistent and not shown any losses. GHL use different LED's although I am surprised and quite disbelieving to any claim a radion loses PAR over time.
There are many back bedroom LED gurus out there, getting a bit like the amount of hobby chemists in this industry. I take very little interest in anything unless its proven in a lab.
The Mitras has been proven in a lab and also in a leading Germany university that studies illumination.
There are many back bedroom LED gurus out there, getting a bit like the amount of hobby chemists in this industry. I take very little interest in anything unless its proven in a lab.
The Mitras has been proven in a lab and also in a leading Germany university that studies illumination.
I have been following this thread for a while FYI. I have to call BS on that one. I would believe you if you said something like "very small losses due to highly efficient cooling design". No par losses at all, come on man. I am by no means a lighting expert but I am a somewhat effective web searcher. I can find information from a major led manufacturer that discusses brightness losses which would translate to par losses.
AQD_ottawa
New member
I think it would be wise to research how LED's work in regards to output they have absolute no degradation parts. Before getting into any argument over this it really is worth researching yourself such things.
The only catagorised loss is due to operating temperature the hotter the LED the less efficient the output, GHL Mitras uses temperature dependent cooling, meaning it is variable, it also uses 4 fans.
The only catagorised loss is due to operating temperature the hotter the LED the less efficient the output, GHL Mitras uses temperature dependent cooling, meaning it is variable, it also uses 4 fans.
Last edited:
reefmutt
Active member
So mirkus, are you saying that the par loss/emission loss is due to excessive heat only or are there other factors involved?
I know zippo about led tech... I am just asking..
I assume that the radions have variable speed cooling fans as the Mitras do..
Maybe not.. But if they do, I'd be curious to know what else plays a role in led degradation..
If it is only due to excessive heat, I think (assume) the Mitras have that covered..
I know zippo about led tech... I am just asking..
I assume that the radions have variable speed cooling fans as the Mitras do..
Maybe not.. But if they do, I'd be curious to know what else plays a role in led degradation..
If it is only due to excessive heat, I think (assume) the Mitras have that covered..
AQD_ottawa
New member
As far as I know only Mitras have variable speed control out of all the LED's I could be wrong of course. Having said that a fan running full whack all the time instead of ramping up an down to the environment is in no way going to be detrimental to the LED's life span.
But yes as we are talking about Mitras here and not getting dragged into other manufacturers lamps into the discussion.... The mitras has cooling covered and some.
But yes as we are talking about Mitras here and not getting dragged into other manufacturers lamps into the discussion.... The mitras has cooling covered and some.
sahin
Ultimate Reefer
Mirkus is correct.
All LED's lose output over time. LED leaders Cree even state this on their website. http://www.cree.com/Lighting/Tools-and-Support/FAQ-General
Under the questions in the FAQ: Cree state: Lifetime: Lifetime, given as L70, is the number of operating hours until the light intensity is reduced to 70% of original.
As to how fast that loss takes place depends on many factors...controlling the junction temperature keeps the loss to a minimum, however, regardless of that, there will be a loss of output over time.
No LED is immune to this currently as far as I know.
sahin
Ultimate Reefer
You will need to refer to the product spec sheet for a specific diode to find out the L70.
Having said that, I must point out that I wouldnt be too worried about output loss. MOST of us run our LED units much less than 100%, so even if in 5 years the unit had lost 10% of its output (just using that figure as an example), you can simply increase the intensity on the unit to make up for it.
Also, I BET there will ONLY be a handful of people (or even ZERO) still using a Mitras 6100 in 10 years time! So no real need to worry. :lol:
Having said that, I must point out that I wouldnt be too worried about output loss. MOST of us run our LED units much less than 100%, so even if in 5 years the unit had lost 10% of its output (just using that figure as an example), you can simply increase the intensity on the unit to make up for it.
Also, I BET there will ONLY be a handful of people (or even ZERO) still using a Mitras 6100 in 10 years time! So no real need to worry. :lol:
AQD_ottawa
New member
You can but no real need the lamp is designed to work at optimum temp.
LED manufacturers all state degradation at around 50,000 hours.
LED manufacturers all state degradation at around 50,000 hours.
jimmy n
Active member
Question:
If i bring output power from 100%to 75% ,will PAR drop respectfully .
Just notice my Red Robin stag showing burn tips((
100 appears high. I'm at 61% having come up a 1% or so per week since I got them from 40 percent.
jimmy n
Active member
I see. That would make your PAR a tad on the low side.
buildinboats
Premium Member
Getting my PAR meter soon
Did you already order it? I ordered one today, an Apogee MQ-200 and was thinking about renting it out as it seems to be mostly short term usage to check and set ones lamps.
AQD_ottawa
New member
Fyi, I just posted on the GHL forum that Mitras will be offered with free shipping until the end of march we are passing on our USD currency exchange to end users.
