ww,620-630nm,640-660nm,450-470nm ?
- Thread starter tekdc911
- Start date
mmmmbrownies
Active Member
i'm counting 45 leds.... might want to drop it to 30 or less if 90watt if watt you're aiming for or get a 150w driver 
i would use less white and throw in more red and blue and maybe add one UV or Far red depends on what you are after
i was actually reading something recently about the advantages of some green light (yeah i know)
just make sure your driver can handle the wattage
enjoy experimenting
i would use less white and throw in more red and blue and maybe add one UV or Far red depends on what you are after
i was actually reading something recently about the advantages of some green light (yeah i know)
just make sure your driver can handle the wattage
enjoy experimenting
tekdc911
Well-Known Member
it will probably be on 2 drivers
i was just figuring around 2 w a led to get an idea
i have a panel that has uv and ir
so i figured id leave it out of these seeing how i have issues with the ir burning at close distances
might be the uv there next to each other and if i run my panel at around 6" on a scrog i get one burn spot directly under these 2 emmiters
i was just figuring around 2 w a led to get an idea
i have a panel that has uv and ir
so i figured id leave it out of these seeing how i have issues with the ir burning at close distances
might be the uv there next to each other and if i run my panel at around 6" on a scrog i get one burn spot directly under these 2 emmiters
tekdc911
Well-Known Member
probably should of explained my setup im running a 135w bloom directly above and using a 7 band hung side ways
i turn the plant daily if not every couple of days on the other corners i use cfl's 68w 2700k im wanting to build them so i can run them flat in a scrog or sideways for sidelight to make my box more adaptable to different grow styles with just a yo yo adjustment
the cfl's get in the way seeing how they are only effective close any led light that does leak past the foot print is intercepted by the large coils
how many watts of led is needed to cover a 3' X 4' space ?
i turn the plant daily if not every couple of days on the other corners i use cfl's 68w 2700k im wanting to build them so i can run them flat in a scrog or sideways for sidelight to make my box more adaptable to different grow styles with just a yo yo adjustment
the cfl's get in the way seeing how they are only effective close any led light that does leak past the foot print is intercepted by the large coils
how many watts of led is needed to cover a 3' X 4' space ?
tekdc911
Well-Known Member
| 30 Watt High Power Planar Chip On Board (COB) Cool White LEDs. 2700 lumen with wide 100 degree viewing angle. |
| Product Specifications | |||
|---|---|---|---|
| Continuous Forward Current | 1000mA | Forward Voltage | 30V |
| LED Package | COB | Lumen | 2700 Lumen |
| Maximum Forward Voltage | 34V | Millicandela | 1203000mcd |
| Operating Temperature | -20~+80 °C | Peak Forward Current | 1500mA |
| Power Dissapation | 10W | Reverse Current | 10µA |
| Reverse Voltage | 5V | Storage Temperature | -30~+100 °C |
| Total Power Consumption | 30 Watts | Viewing Angle | 100 degree |
| Dimensions: 5.22cm(2.06") x 5.22cm(2.06") x 0.188cm(0.07") |
| Characteristics - Absolute Maximum Ratings @ Ta=25°C | ||||||
|---|---|---|---|---|---|---|
| PARAMETER | MAXIMUM | UNIT | ||||
| Power Dissipation | 10 | W | ||||
| Peak Forward Current (1/10 Duty Cycle,0.1ms Pulse Width) | IF(peak) | 1500 | mA | |||
| Continuous Forward Current | IF | 1000 | mA | |||
| Reverse Voltage | VR | 5 | V | |||
| Operating temperature range | Topr | -20°C ~ +80°C | ||||
| Storage Temperature Range | Tstg | -30°C ~ +100°C | ||||
| Thermal Management Specifications | ||||||
| LED junction temperature | Tj | 105 | °C | |||
| Thermal resistance | R[SUB]θJC[/SUB] | 12 | °C/W | |||
| Suggested cooling area (sides exposed to open air) | 800-1200 | cm[SUP]2[/SUP] | ||||
| Flux Characteristics (Tj = 25°C) | ||||||
| Color | Lumen | CCT Range | ||||
| Cool White | 2700 | 7000-8000K | ||||
| Warm White | 2700 | 2800-3200K | ||||
| PARAMETER | Test Condition | Min | Typ | Max | UNIT | |
| Forward Voltage | VF | IF=1000mA | 30 | 32 | 34 | V |
| Reverse Current | IR | IF =1000mA | 10 | uA | ||
| Lead Soldering Temp | 260°C for 5 seconds |
Mechmike
Well-Known Member
105c is the highest rated junction temperature the LED can tolerate. That's pretty good since many are lower. At that temperature the life and luminescence of the LED will be reduced. Cooling is essential. A pizza pan doesn't have enough surface area to cool many LEDs. I don't remember the exact number but I think its something like 20 sq/in of radiating area per watt for adequate cooling. Finned aluminum heat sinks do the trick. Look at the Astir panel thread. Much is explained there.