Greenhouse Supplemental Lighting
Supplemental lighting is a high intensity of artificial light to build on what the sun can naturally provide. Within reason, more light will always drive faster growth at a higher quality, particularly if the light is of high spectral quality.
Generally target around 50-70 µmol*m-2*s-1, or about 100-140 sq ft per HI-Top 330 Fixture of coverage (ideally 6-10 ft fixture heights). Larger areas, higher hang heights and/or more demanding crops will typically use the 530W HI-Top for the most cost effective production of higher levels of lights. Contact us for recommendations specific to your application.
- - More light is almost always better for the plants, but something is always better than nothing.
- - Generally useful September - April, but primarily November - February, especially at higher latitudes and where cloud cover is greatest.
- - Most critical for produce (higher yields and quality), propagation (faster rooting, stronger plants), and high value crops (e.g. medicinal crops)
- - Where spatial constraints are present, e.g. less than 5 ft hang heights or 6 ft grow area widths, Contact us for alternative TotalGrow solution recommendations.
Mud Lake Farm:
Hydroponic lettuce & herbs
We were very pleased with the results. Not only did the TotalGrow™ light outperform the HPS by 10%, but it did so using far less energy. This fall, we invested in enough lights to fill a greenhouse. We fully intend to switch over all our greenhouses over the next few years. For us, TotalGrow™ lights last longer and use less energy and give better yields – it just makes sense.
Steve Van Haitsma, Owner
Great Lakes Hops:
We found that installing the TotalGrow™ light system has improved our plant quality and sped up our operations, which allows us to do more cycle turns and expand our business without putting up more greenhouse space.
Lynn Kemme, Owner
Tomato production, overhead/interplant lighting
Our TotalGrow™ light fixtures have made it possible for us to grow larger, healthier tomatoes in significantly less time.
David Allen, Business Manager
Ohio State University Agricultural Technical Institute:
Bedding plant propagation, 143W TotalGrow vs. 400+ W HPS test
TotalGrow™ lights demonstrated the potential for drastic energy savings over HPS lights while producing crops of equal or better quality in our bedding plant testing. With 20% less PAR light intensity, our primrose plugs grew over 33% wider and taller with better green pigmentation than HPS.
Robert McMahon, Ph.D., Horticultural Technologies Professor Emeritus
Miller Family Farm:
HPS + TotalGrow hybrid lighting
We have installed TotalGrow light fixtures for both indoor and greenhouse grow areas with tremendous crop quality, growth rate and power saving results. In our tomato house, the TotalGrow lights are balancing out HPS light fixtures to create a better light spectrum and distribution pattern with reduce power needs. In our barn, their full spectrum and efficiency allow us to grow excellent leafy greens year-round.
Robert Miller, General Manager
In a controlled experiment, our Vanda seedlings grew larger and stronger than seedlings grown under natural light. In some instances as much as 40% increase in mass was observed. The additional growth was most evident in the increased root mass of the seedlings grown under TotalGrow™ light, perhaps as a result of the photosynthetic ability of orchid roots. Based on our experience at Motes Orchids, I can recommend TotalGrow™ lights to any grower as a benefit under low light conditions.
Martin R. Motes, Ph.D., Owner
Propagation & photoperiodic lighting
I hesitate to turn on my HID lights due to the energy costs, but I don’t think twice about turning on my TotalGrow lights due to their efficiency and longevity.
Scott Gruppen, Production Manager
Perennials propagation, HPS replacement test with 1/3 power
We completed growing tests using the Venntis Technologies TotalGrow™ light fixtures. We tested several varieties of perennials and our results showed similar plant vigor and health while reducing our energy consumption.
Troy Shumaker, CFO
Bedding plant propagation with TG1A Broad Grow Spectrum Light Bulbs
Adams Greenhouse & Produce, LLC:
Lettuce, kale, cabbage, broccoli, etc.
The lights are fantastic!!! We have seen a great improvement by having the lights. The plants are so much farther ahead of schedule than we had anticipated. They are growing great and we have not had a problem with them. The plants are not stretching for light and have thick stems and are growing nice and straight.
Kenny Adams, Owner
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