Cree x lamp Xp e2

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SamWE19

Well-Known Member
I’m struggling to understand this datasheet.


it shows the voltage going up as the current goes up. So it looks like at 1000ma the voltage is around 3v would would suggest max wattage or 3w each.

is this correct?

if so would I be able to wire 8 of them in series to get 24v use a 24v driver and wire however many parallel strings of 8 to get 1000ma per string?

cheers
 
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Sinfor

Well-Known Member
If you connect 8 in series to a 24v constant voltage supply you will get around 575mA per string.
To get 1000mA you need to supply around 25.2V per string.
 
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SamWE19

Well-Known Member
Sinfor said:
If you connect 8 in series to a 24v constant voltage supply you will get around 575mA per string.
To get 1000mA you need to supply around 25.2V per string.
Click to expand...
If I use a 24v driver that supplies 1000ma surely the leds will get 1000ma not 575?
 
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Sinfor

Well-Known Member
SamWE19 said:
If I use a 24v driver that supplies 1000ma surely the leds will get 1000ma not 575?
Click to expand...
No way, you can even connect them to a 10 amps power supply and the 8 LEDs just will get 575mA. As you noticed current increase as voltage increase, so to pass 1A through the LEDs you need to increase the voltage up to 3.15V(x8=25.2V).
XPE2White.jpg
Normally you don't work LEDs to its maximum current so 575mA is not a bad option. If you still want to drive them harder you can replace 2 whites with 2 photo red to increase the Current.
The 1000mA rating is just how much Current the supply can deliver under normal conditions, you can pull more but you can also damage the supply especially if this one doesn't have an over load-current proteccion
 
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SamWE19

Well-Known Member
Damn so if I want a few photo red, far res, blue, and royal blue I’m going to have to piss about with several different types of driver?
 
Rocket Soul

Rocket Soul

Well-Known Member
SamWE19 said:
Damn so if I want a few photo red, far res, blue, and royal blue I’m going to have to piss about with several different types of driver?
Click to expand...
Either that or organize them in strings, so you have the same amount of each type in each string.
 
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SamWE19

Well-Known Member
Rocket Soul said:
Either that or organize them in strings, so you have the same amount of each type in each string.
Click to expand...
Haven’t checked yet but if each colour requires a different voltage I’m still gonna need 4 or 5 different types of drivers one for each colour. At work atm so havnt had a chance to check data sheets.
 
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Sinfor

Well-Known Member
Only with constant voltage supplies with fixed voltage, there are CV supplies with adjustable Voltage like LRS series wich you can adjust the voltage to the desired level.
You can also use boost-buck converters or resistors to limit the voltage or current.
 
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SamWE19

Well-Known Member
Sinfor said:
Only with constant voltage supplies with fixed voltage, there are CV supplies with adjustable Voltage like LRS series wich you can adjust the voltage to the desired level.
You can also use boost-buck converters or resistors to limit the voltage or current.
Click to expand...
Meanwell hlg-600h-24b can have the voltage adjusted can’t it?
 
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SamWE19

Well-Known Member
SamWE19 said:
Meanwell hlg-600h-24b can have the voltage adjusted can’t it?
Click to expand...
Ok I guess a better way to put my question is to make my life simpler does anyone know of any 56cm strip lights that are 24v and specific colours?
So a royal blue strip light
Normal blue strip livht
Far red
And photo red?
 
mauricem00

mauricem00

Well-Known Member
why not jost use a constant current driver and just make uoop strips?all the diodes you will be using have a forwaed voltage of 3 volts except the far red and photo red which are around 2 volts. it is common practice to run diodes at 50-75% of their maximum current. unning those diodes at 600ma will dramatically increase efficiency and diode life'
 
coreywebster

coreywebster

Well-Known Member
SamWE19 said:
Ok I guess a better way to put my question is to make my life simpler does anyone know of any 56cm strip lights that are 24v and specific colours?
So a royal blue strip light
Normal blue strip livht
Far red
And photo red?
Click to expand...
Cutter will knock you up some.
I can help with the LDDs is 700mA is any good. I have like 60 of them unopened.
 
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SamWE19

Well-Known Member
mauricem00 said:
why not jost use a constant current driver and just make uoop strips?all the diodes you will be using have a forwaed voltage of 3 volts except the far red and photo red which are around 2 volts. it is common practice to run diodes at 50-75% of their maximum current. unning those diodes at 600ma will dramatically increase efficiency and diode life'
Click to expand...
What constant current driver can run 600w each?

As I have 15sqm to light up small drivers will require me to buy shit tons of them
 
T

the_residents

Member
Sinfor said:
No way, you can even connect them to a 10 amps power supply and the 8 LEDs just will get 575mA. As you noticed current increase as voltage increase, so to pass 1A through the LEDs you need to increase the voltage up to 3.15V(x8=25.2V).
View attachment 4677511
Normally you don't work LEDs to its maximum current so 575mA is not a bad option. If you still want to drive them harder you can replace 2 whites with 2 photo red to increase the Current.
The 1000mA rating is just how much Current the supply can deliver under normal conditions, you can pull more but you can also damage the supply especially if this one doesn't have an over load-current proteccion
Click to expand...
I have confusion about this, say the driver is 20v-24v 1000ma Constant Current. The driver will throw 1000ma, but the leds will need 25.2V overpowering the driver? or they will just work at 24v (on driver limit), 575 ma?
 
HydroKid239

HydroKid239

Well-Known Member
SamWE19 said:
What constant current driver can run 600w each?

As I have 15sqm to light up small drivers will require me to buy shit tons of them
Click to expand...
Sorry for the random question.. only asking because it may help a little.

Did you plan on placing mylar on the walls, and what about getting stand-up walls/room dividers to place mylar on and shorten the space? Could that take the stress off of having to light up all 15sqm?
 
Rocket Soul

Rocket Soul

Well-Known Member
the_residents said:
I have confusion about this, say the driver is 20v-24v 1000ma Constant Current. The driver will throw 1000ma, but the leds will need 25.2V overpowering the driver? or they will just work at 24v (on driver limit), 575 ma?
Click to expand...
Yes, thats how it works, although i cannot confirm exact numbers. The diodes will only be able to draw the current that the max voltage of the driver allows
 
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