Hello everyone

[brucealmighty]

I'm new to the forum and I'm another rookie just starting my 3rd grow. Though I would take a minute and say hi

 

[brucealmighty]

This is my first attempt with photoperiods and my first time of using the new light I built. My new plants just popped up yesterday. How high should my light be above the plants ( I set it at 30") and how high should I turn it up ( watts at the wall ). my light consists of 6@HLG- Qb288 Rspec's and a 600 watt meanwell driver. I'm using it in a 5x5 tent. I just don't want to burn them up before they have a chance to get going.

 

[Flexnerb]

Welcome to the farm! I dont do led "yet" im sure someone will be along shortly to edumacatechya on that particular issue

 

[Cook2010]

welcome to the farm.
HLG recommends a 48'' mounting height above the canopy for veg and 30''-36'' for flowering
I have a 300w HLG for Veg
I pop seeds under the 300w which is essentially 2 boards at 50% at 48''
works out great just keep optimal temperature 78-85 degrees

 

[Lynch_Ironside]

This is my first attempt with photoperiods and my first time of using the new light I built. My new plants just popped up yesterday. How high should my light be above the plants ( I set it at 30") and how high should I turn it up ( watts at the wall ). my light consists of 6@HLG- Qb288 Rspec's and a 600 watt meanwell driver. I'm using it in a 5x5 tent. I just don't want to burn them up before they have a chance to get going.

Nice job man! Welcome!

 

[brucealmighty]

Thanks for the advice, I will be raising my lights to 48". At this time I have my power turned way down for seedlings and will turn it up as the plants mature, I set the onboard potentiometer to a max of 300watts, (to keep me from doing something dumb with the remote dimmer). At this time I'm having trouble keeping my temp above 71 but that will change when I start turning up the power. Should I be using a space heater? The room is heated but is over the carport and the floor is not insulated (very cold).

 

[Cook2010]

from my understanding (limited experience) LED's run cooler and thus effect VPD calculation because we most of the time measure the ambient temperature and as you mentioned you have a hard time keeping the temps above 71. So if your ambient temps are 71 I would be willing to bet your leaf surface temps are even cooler then 71 degrees. I believe a heater would benefit you