LED Flood lights can be defined as high-intensity, broad beamed artificial lights often used to illuminate outdoor areas. Usually, they are used in playing fields while a sports event is being held during low light conditions. They can also be used during an outdoor function that requires a lot of lighting. Large companies, industries and organizations use them during the night to illuminate their compounds.
What are LED flood lights?
A LED diode that is directly built in together to a special circuit board. Avoiding an extra packaging component suck as encapsulation of the chip, efficiency increases and failure decreases.
- A chip on board LED is basically a LED chip diode built directly on the the circuit board. The chips are bonded directly into the PCB at the manufacturer. Without traditional LED packaging ( 5mm LED , 3528 , 5050 , 5630 , 5730 SMD LED ) , components and assembly is avoided to max out the full potential of the LED chip.
Solar street lights are raised light sources which are powered by solar panels generally mounted on the lighting structure or integrated in the pole itself. The solar panels charge a rechargeable battery, which powers a Led lamp during the night.
- Solar street lights are independent of the utility grid. Hence, the operation costs are minimized.
- Solar street lights require much less maintenance compared to conventional street lights.
- Since external wires are eliminated, risk of accidents are minimized.
- This is a non polluting source of electricity
- Separate parts of solar system can be easily carried to the remote areas
- It allows the saving of energy and also cost
LED GROW LIGHT
What is PAR & PPFD ?
PAR and Visible Light Spectrum- The spectrum of light that is visible to the human eye is approximately 380-780 nm (nanometers). Interestingly, plants also use almost the same spectrum of light visible to the human eye. This part of the electromagnetic radiation, which powers photosynthesis, is named PAR (Photosynthetically Active Radiation) and is usually found in wavelengths from 400 to 700nm. PAR is often confused as a type of measurement, but is more the designation of a region of light within the spectrum that is usable to plants.
PPDF- (Photosynthetic Photon Flux Density) is a measurement that is very important to your plants. Unlike lumens which will only measure the brightness of a light source, PPFD measures the number of photons within the PAR region that reach the target each second. Simply put, a PPFD measurement will tell you how much necessary light (within the PAR region 400-700nm) is actually making it to your plant.
Growth stages of Green Plants
There are also generally 4 growth stages in green plants that have different spectrum requirements
- Vegetation – In Vegetation (VEG) stage, rapid, healthy overall plant and root growth is desired, and in general most growers desire maximum growth but with shorter compact plants with short inter-nodal spacing preferred
- Pre-flower – Pre-flower is the period from when the 12/12 flower cycle is first initiated, to roughly the end of the second week (in an 8-week flower), or until the small flowers are prevalent and the rapid growth stretch slows. Again, for most growers, the desire in this stage is to maximize SIZE, while limiting stretch
- Flower – The peak Flower period is generally from week 3-7 and is the time when the plant (stem / leaf) growth stops and all the plant energy focuses on flower production. Maximum flower matter size and good structure is generally the goal here
- Ripen or Finish – The Ripen period is generally from week 7 to finish (in an 8-week flower) where the Flower growth, (i.e. size) slows and plant energy refocuses on resin and terpene production. This is the period where the flower acquires a significant portion of it’s density, ie. resin content. This transition is not clearly defined, and some strains have big increases in resin production during this period, and others not as much
HEAT CIRCULATION - HPS VS LED
The beam heat from HPS will raise the temperature in the top of the greenhouse. This heat will circulate to the temperature sensor, which will close / reduce the bottom heat. This results in “cold roots”, which affects the crop’s growth. To avoid this situation, the windows open, temperature is dropping and allowing the temperature sensor the opportunity to open the bottom heat. As a result, the open windows will cause loss of heat and CO2
At a working temperature at only 45°C for the Senmatic LEDs, the climate condition for the crop is significant more comfortable. Bottom heat can be active under all conditions, to secure active roots and resulting in optimum growth conditions. The significant lower working temperature of the LED fixtures allows less ventilation and protect heat and Co2 loss, too
Green light: Is it important for plant growth?
Green light is considered the least efficient wavelength in the visible spectrum for photosynthesis, but it is still useful in photosynthesis and regulates plant architecture
The majority of green light is useful in photosynthesis. The efficiently plants use wavelengths between 300 and 800 nm. Green light is the least efficiently used color of light in the visible spectrum
One potential advantage of including green in a light spectrum is to reduce eye strain of growers. Under monochromatic, or sometimes two colors of light such as blue and red, plants may not appear their typical color, which could make noticing nutritional, disease or insect pest issues difficult. Another potential advantage of green light is that it can penetrate a canopy better than other wavebands of light. It’s possible that with better canopy penetration, lower leaves will continue to photosynthesize, leading to less loss of the lower leaves