1.1 Plants use light energy between 400 and 700 nanometers in wavelength, this region is known as the Photosynthetically Active Radiation (PAR). Illumination for plants, also known as "irradiance", and is sometimes measured in PAR watts per square meter (W/m2).
1.2 Another means of measuring light quantity for plant growth is the discrete units of quantum flux in the PAR region called "photons". Photon flux is commonly measured in units of micromoles per square meter per second (μmoles/m2/s) i.e. PPFD, where 1 mole of photons = 6.022 x 1023 photons. (Avogadro’s Number). When the CRI (Color Rendering Index) of the light source is close to 100, emulating pure sunlight, an accurate conversion can be made from Lumen to Lux to PPFD - (Photosynthetic Photon Flux Density)
1.3 Lamp manufacturers typically rate their lamps in lumens, a measure of light in the spectrum visible to humans. Moreover, most lighting engineers measure lighting levels in lumens per square meter (lux) or per square foot (foot-candles). Since the spectral sensitivities of plants and humans are quite different, there is no direct method of converting the units without evaluating the full range of spectral characteristics for a given light source.
1.4 Our calculation of PPFD is based on high CRI and full solar spectrum for radiation of 400-700 nm. from the Growth Chamber Handbook – NCERA-101 (https://www.controlledenvironments.org/growth- chamber-handbook/ ) LiteBLOCK™️ LED lighting products have been developed to the highest standards in the industry ensuring high reliability and performance.
1.5 The LiteBLOCK™️ LED lighting system is composed of two main components manufactured to custom needs:
a) LED Module b) Driver
LiteBLOCKTM™️ is a light engine which can be easily configured optically to client’s requirements.
1.6 LiteBLOCK™️ is complete and never needs to be mounted in a luminaire or additional reflectors, IYWInc and Lightron Technology Inc. need to be consulted to ensure correct thermal operation and that local regulatory requirements are met. Any modification or change to our products without our consent will deem warranty void and possibly compromise safety.
1.7 Depending on the application and use, our LED modules produce illumination efficiencies from 124 Lm/W (Lumens per Watt) to over 140 Lm/W for numerous types of applications, HID Hydroponic Lighting, rarely gives luminous efficacies of over 90 Lm/W falling off quickly with time. LiteBLOCK offers 100,000 hours of operation exceeding IESNA LM‐80 and TM‐21 predictions of longevity and performance.
1.8 The LED Driver Modules are configured for specific client requirements and are not interchangeable with other products. The Driver module is usually mounted with the LED module resulting in an integrated structure complying with the most rigorous safety and performance standards.
1.9 Our LiteBLOCK™️ LED lighting series is designed to give our clients the utmost flexibility enabling adaption to most plant culture applications. The specification below is specific to the 17 Inch Hi-Bay Model: IYWI-15B/L50-80VMD.
2.0 Controversy: Hydroponic Lighting Methods – Blue, Green and Red Specific Wavelengths.
2.1 There is a multitude of publications and research studies concerning specific spectrums to optimize plant growth at different stages of the life cycle- from germination to flowering and fruition.
2.2 We do not advocate or denounce the use of specific spectrums that have been subject to a lot of study and research, however, our tests and trials have revealed excellent results in hydroponic applications when using the “LED sunlight spectrum” i.e. high CRI and sunlight CCT (5000K)
2.3 There are many forums e.g. “U-Tube” discussing differences between “Gro-Lights” and “White Light” and in summary, advantages of growth rate and energy saving of Gro-Lights over high-quality White LEDs are very questionable.
2.4 LiteBLOCK statements present very straightforward viewpoints:
a) Plants have evolved over millions of years in the Sunlight spectrum so why change something that had evolved naturally?
b) Our knowledge of long-term detrimental effects of genetically altered plants and artificial lighting is very limited, we should be cautious in declaring superior knowledge to mother nature.
c) Mankind has benefited from technological innovation, but we must also exercise caution to critical industries such as the food industry.
d) Benefits of saving energy by use of LED over HID are obvious, (No matter whose product), we advocate: “try to emulate the sun spectrum and you emulate natural sunlight.”
e) LiteBLOCK can be purchased with very high CRIs to permit its use as a “Universal Grow Light” which enable cultivators to grow a grand range of vegetable and fruit products all year around.
f) LiteBLOCK can be programmed to various light levels to avoid “photoinhibition”.
The cultivator is the expert that makes the judgment calls on lighting levels.
AEDL Ltd. Distributors. LiteBLOCK™️ Data Sheet; December 2019 top of page.