13500lu 5000k parking lot light good for growing?

P

Paranoidandroid42

Active Member
I have a high output led area light that I want to use for my 2 plant veg and flower cycles. It will be in a 3wx5lx8h and 10' ceiling.
Light specs:
100w at 13,500lu or 200w at 14500lu, 4000k or 5000k depending on which model I have.
122lpw
Doesn't get overly hot but space will be well ventilated.
I'm mostly just concerned about light bleach and really how high to hang them.
They are meant to cover a very larger area and are extremely bright.
But it is only 70 cri which is less then the sun.
So will it bleach or burn my plants? Or cause any other issues?
I included the specs.
 

Attachments

Frank Nitty

Frank Nitty

Well-Known Member
Paranoidandroid42 said:
I have a high output led area light that I want to use for my 2 plant veg and flower cycles. It will be in a 3wx5lx8h and 10' ceiling.
Light specs:
100w at 13,500lu or 200w at 14500lu, 4000k or 5000k depending on which model I have.
122lpw
Doesn't get overly hot but space will be well ventilated.
I'm mostly just concerned about light bleach and really how high to hang them.
They are meant to cover a very larger area and are extremely bright.
But it is only 70 cri which is less then the sun.
So will it bleach or burn my plants? Or cause any other issues?
I included the specs.
Click to expand...
Try it out
 
jimihendrix1

jimihendrix1

Well-Known Member
Both a 1000w Hortilux HPS, and a Gavita Dual End HPS have a CRI of 23, and they work great in both veg, and flowering.

14,500 lumens is nothing. A 1000w Hortilux HPS is 145,000 Lumens, and the 1150w Gavita is 166,000 lumens.

The 1000w Hortilux is 1643umol. Gavita 1150w DE HPS is 2100 umol.

A 400w Hortilux HPS by comparison is 55,000 lumens and 713 umol at 2000k. It would be only a miniscule amount higher at 2100k. Maybe 720umol.

The LED light is being slightly over rated for lumens per watt. The 300w LED is 133 lumens per watt and not 138. At 14,000 lumens and 3500k of Low CRI LED it is 232 Umol, and a 4000k High CRI LED at 14,500 lumens is 258 umol. Not alot of difference. Clearly the HPS smashes it when it comes umol for each llights given kelvin rating.

By comparison the 400w HPS Hortilux is 137.5 lumens per watt. And contrary to popular belief, lumens can be a good predictor of Umol.

I wouldnt worry about light bleaching, and given the stats Id keep that light no more than 10 inches from the top of the canopy. You can run a 400w Hortilux as close as 5-6 inches if you have good airflow. I run my 1000w Hortilux 20-24 inches from the top of the canopy, and have really really good fresh air exhange. In the winter when its really cool, I can ghet it as close as 15 inches. The main thing is have really good airflow, and assuming temps at the canopy dont exceed 85 degrees though I have had it hotter without many problems. Air exchange is key.

Also take into consideration I have no idea how hot that LED runs, so start out farther than 10 inches, and measure the temp, and bring the light up, or down accordingly.
Also consider those LED Diodes used are almost assureadly not Samsung 310b and are much less efficient.

A 300w LED with the best Samsung Diodes are at optimum usage for a 7.5 Square Foot Area. I would say that light is probably at least 1/3 less efficient and will be at optimum in a 5 square foot area. 2.3 x 2.2 area. A 365w LED with the Samsung 301b Diodes is optimal for a 3 x 3 area.

I get my watts per square foot square foot calculations using specs from the Gavita 1700e. The 1700e is 645w, and is 1700 umol, and is made for a 4 x 4 area according to Gavita, so I am not using my opinion. 645w divided by 16 squaare feet is 40.3w sq.ft.

Convert Lumens to PPF - Online Calculator | Waveform …
  • Estimated Reading Time: 1 min
Calculate Result: - About the Lumens to PPF (umol/s) Calculator You may find yourself comparing LED grow light specifications, where one light uses lumens and the other uses PAR units such as PPF (umol/s).
 
Last edited:
jimihendrix1

jimihendrix1

Well-Known Member
Paranoidandroid42 said:
I have a high output led area light that I want to use for my 2 plant veg and flower cycles. It will be in a 3wx5lx8h and 10' ceiling.
Light specs:
100w at 13,500lu or 200w at 14500lu, 4000k or 5000k depending on which model I have.
122lpw
Doesn't get overly hot but space will be well ventilated.
I'm mostly just concerned about light bleach and really how high to hang them.
They are meant to cover a very larger area and are extremely bright.
But it is only 70 cri which is less then the sun.
So will it bleach or burn my plants? Or cause any other issues?
I included the specs.
Click to expand...

At 3 x 5 thats 15 square feet. Using the best Samsung Diodes you would need about 600w to equal a 1000w Hortilux HPS HID.

A 1000w Hortilux HPS is made for a 4 x 4 area. It is claimed that the best LED are 1 Third more efficient than the best HID, and are not claimd to be better, only equal as per Gavita. So for a 15 square foot area 600 watts divided by 15 square foot equals 40 watts sq/ft. Simple math.
 
P

Paranoidandroid42

Active Member
Found out today after I got to work they are 150w that are meant to replace 400w high pressure sodium's and intense light like that.
I have 2 so gonna be pushing the equivalent of 800w hps and such with 300w drain.
I think I'll add my crappy Walmart red and blue selectable light for some added blue and red during appropriate stages.
Going to be bright tonight lol.
 
jimihendrix1

jimihendrix1

Well-Known Member
They may state theyre meant to replace a 400w HPS, but the numbers say theyre not.

The 150w LED you have is probably around 18,000 Lumens, and the 400w Hortilux is 55,000 Lumens.

Converting that to umol at 4000k is 330umol. 2 of them is 660umol.

1 x 400w Hortilux HPS is 713umol.

2 of those lights arent even equal to 1 x 400w Hortilux HPS.

A 600w Hortilux HPS is 1167umol, and 90,000 Lumens.

To equal a 600w Hortilux HPS you would need about 3 and a half, to 3 and 3 quarters of those lights.

3 of those LED would be 990umol, and you would need another 170umol.

2 of those lights are nowhere near a 600w HPS, and a 600w Hortilux HPS is made to cover a 3 x 3 area or 9 square feet. You have 15 square feet. To get to 40w sq/ft you need about 600w worth of the best LED there is with Samsung 301b Diodes.

If that light doesnt have Samsung 301b Diodes, the efficiency is even less.

Bottom line is to cover a 15 square foot area, and equal the power of an HID you need 600w of the very best LED Diodes, at 40w a square foot.

At their best an LED is 1/3 more efficient than a HID. It basically takes 645w of the very best LED/Samsung Diodes to equal a 1000w Hortilux HPS in a 4 x 4 area, and Im still skeptical about that to tell you the truth.

600w divided by 15sq/ft is 40, which is 40w Sq/ft of light. Thats what a Gavita 1700e is equal to. 40.3w sq/ft, and 1700umol.

If that company is saying 1 of those 150w LED can replace a 400w HID, theyre lying.
 
Last edited:
Frank Nitty

Frank Nitty

Well-Known Member
jimihendrix1 said:
They may state theyre meant to replace a 400w HPS, but the numbers say theyre not.

The 150w LED you have is probably around 18,000 Lumens, and the 400w Hortilux is 55,000 Lumens.

Converting that to umol at 4000k is 330umol. 2 of them is 640umol.

1 x 400w Hortilux HPS is 713umol.

2 of those lights arent even equal to 1 x 400w Hortilux HPS.

A 600w Hortilux HPS is 1167umol, and 90,000 Lumens.

To equal a 600w Hortilux HPS you would need about 3 and a half, to 3 and 3 quarters of those lights.

3 of those LED would be 990umol, and you would need another 170umol.

2 of those lights are nowhere near a 600w HPS, and a 600w Hortilux HPS is made to cover a 3 x 3 area or 9 square feet. You have 15 square feet. To get to 40w sq/ft you need about 600w worth of the best LED there is with Samsung 301b Diodes.

If that light doesnt have Samsung 301b Diodes, the efficiency is even less.

Bottom line is to cover a 15 square foot area, and equal the power of an HID you need 600w of the very best LED Diodes, at 40w a square foot.

At their best an LED is 1/3 more efficient than a HID. It basically takes 645w of the very best LED/Samsung Diodes to equal a 1000w Hortilux HPS in a 4 x 4 area, and Im still skeptical about that to tell you the truth.

600w divided by 15sq/ft is 40, which is 40w Sq/ft of light. Thats what a Gavita 1700e is equal to. 40.3w sq/ft, and 1700umol.

If that company is saying 1 of those 150w LED can replace a 400w HID, theyre lying.
Click to expand...
Teach
 
You must log in or register to reply here.
Top