Hlg 650r

Setting up my new 60x60x80 tent with a hlg 650r. How tall realistically can the plants get? Does this light really need 30" from canopy and 15" between top of the light and tent celing?

This is one reason I feel that strips are superior, especially in a tent. The HLG 650r is a very powerful light, the fact that it has 4 boards that aren't spaced very far apart and are driven to ~150w per board, it definitely requires adequate distance from canopy. I think you could get away with less than 15" above the light if you have a fan supplying airflow.

Anyone able to answer the rest of this question or list what their hanging heights/settings are for this light? No way people are using these in a tent and following what HLG says, 15" from ceiling, 30" away from canopy in flower and figure a grow pot is around 12", that'd leave you with 15" of total grow space in a 72" tall tent. Am I too high and missing something?

I just upgraded from a 600W HPS in a 4x4 to a 600 Rspec in a 5x5 and could use some help on getting the most out of it.

Sqwee said:

Anyone able to answer the rest of this question or list what their hanging heights/settings are for this light? No way people are using these in a tent and following what HLG says, 15" from ceiling, 30" away from canopy in flower and figure a grow pot is around 12", that'd leave you with 15" of total grow space in a 72" tall tent. Am I too high and missing something?

I just upgraded from a 600W HPS in a 4x4 to a 600 Rspec in a 5x5 and could use some help on getting the most out of it.

Click to expand...

If you check out Ewe-Tube you'll find some guys using fancy Quantum Sensors to figure out how to hang that light. At Full Power, 32" above the canopy you'll get great spread over your 5 x 5 area without blasting your plants.

If you can't get the full 32" head room, you can dim the light. That will tone down the light directly under the light (the hot spot) so it's safe, but it will limit your light to the corners a little.

The issue with dimming the light is that nobody knows exactly how much you turned it down, so nobody can tell you exactly how night to hang it. There's like too many variables to consider.

To figure out the right height, you can use a device to measure the amount of light your 600r is producing at whatever height you've got it. Then then it down until you get a Safe amount.

If you search around on Ewe Tube you can find info on cell phone apps to measure LED light. Or using cheap LUX(brightness) meters then converting that info into PAR to figure out what settings to use. Or you can get a fancy $200-500 Quantum Sensor and measure the PAR of your LED light directly.

You can get a cheap UNI-T lux meter for $20
Migro has tested against his Apogee PAR meter and the results are very consistent, within a few percent.
With the UNI-T lux meter, the conversion factor is .017 (58000 lux = 1000 PAR)

In addition to measuring absolute levels, a light meter is quite handy for those using multiple lights to achieve optimal spacing

From grow pics I'm seeing it looks like people are running it way closer than the recommended 15" from the ceiling.

I'm not against getting a meter, just looking for a rough idea how tall people are growing their plants under this light and how close they're getting it to the canopy because the numbers HLG is providing just don't work out in a tent and I'm going to have to adjust how long I veg. I was under the impression you call tell how far you've dimmed these by monitoring what its pulling from the wall?

Billy the Mountain said:

You can get a cheap UNI-T lux meter for $20
Migro has tested against his Apogee PAR meter and the results are very consistent, within a few percent.
With the UNI-T lux meter, the conversion factor is .017 (58000 lux = 1000 PAR)

In addition to measuring absolute levels, a light meter is quite handy for those using multiple lights to achieve optimal spacing

Click to expand...

Thanks, I found the video and will order one.