Welcome to our comparison between 300w LED and a 400w HID.
To maximize the opportunity for phenotype consistency two PPP seeds will be germinated and grown out for use as mother plants. When they are mature enough, clones will be cut and two different cloning methods will be used for rooting. Genetically identical clones will then be selected for the comparison grow.
1) The Lights
2) LED Specifications and Recommendations for Use.
3) HID Specifications and Recommendations for Use:
4) Key Details and Other Parameters:
5) Objective
6) Netiquette
To maximize the opportunity for phenotype consistency two PPP seeds will be germinated and grown out for use as mother plants. When they are mature enough, clones will be cut and two different cloning methods will be used for rooting. Genetically identical clones will then be selected for the comparison grow.
1) The Lights
- For the test, ------------ has donated one of their 300w LED Grow lights ($949.99 plus shipping)[/url]
- The HID side will be represented by the following equipment:
- Lumatek 400w digital electronic ballast.
- Sun Systems Yield Master II 6" air-cooled reflector.
- Sylvania Metalarc 400w MH bulb for vegetative phase.
- USHIO HiLUX Gro 400w HPS bulb for flowering phase.
2) LED Specifications and Recommendations for Use.
- ------------ recommends to not exceed a distance of 30" inches from the canopy in vegetative phase and 16" in flowering.
- Approximate coverage Area of 4.5' x 4.5' and 3' x 3' core saturation.
- Size: 19"X13"X3"
- Weight: 19 pounds
- Running with glass shield in place
3) HID Specifications and Recommendations for Use:
- Lumatek latest version dimmable 400w electronic digital ballast. (no dimming or "superlumens" mode will be used).
- Sun Systems Yield Master II 6" air/coolable reflector. Dimensions: 18 1/2" long x 22 1/2" wide x 7 1/4" tall.
- Sylvania Metalarc MH400U 400w metal halide bulb for veg.
- USHIO HiLUX GRO 400w HPS bulb for flowering.
4) Key Details and Other Parameters:
- Tents are Secret Jardin DR80's; qty 2, 32" X 32" X 64".
- The strain is Pure Power Plant from Nirvana Seeds.
- Maximum of 4 plants per light. One tent per light.
- Total veg time before flowering will be decided by the Growmeister - during the grow
- Grower shall may cull up to two plants from each tent at any point in order to optimize environment and maximize yield.
- Plants will be harvested individually when trichomes are approximately 75/25 cloudy/amber.
- Nutes will be General Hydroponics 3-part Flora series.
- The containers are 3-gallon self-watering pots.
- Clones will be transplanted directly into the self-watering pots.
- The grow medium will be 80% Perlite and 20% Pondcare Aquatic Soil.
- Each tent is independently ventilated by a Soler & Palau TD100X (100cfm) 4” exhaust fan mounted outside the tent, pulling air through a 4” HTG Supply Pure Flow 4 carbon filter mounted horizontally at the top of each tent for odor control. Intake is passive and through vents at the bottom of each tent.
- Setting Sun's discretion to alter any setpoints or targets during the grow.
5) Objective
- The point of this grow is to maximize net dry weight from each side for comparison
- Each tent may be run with different setpoints at the discretion of the Growmeister
Harvest will be performed when the Growmeister estimates 75/25 cloudy/amber; a nice "head high target"
6) Netiquette
- 420 Magazine's Forum Posting Guidelines apply
- Bashing, flaming, or arguing on the part of any parties will result in an immediate ban. There will be no LED flame wars in this thread
- HPS vs. LED comparison discussion are welcome - please keep comments constructive and positive
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