It is best to calculate how much cannabis you need each year. MMJ patients and regular recreational users are best served making a one-off investment in decent standard lights. Also, the more harvests you intend to have, the quicker you ‘pay off’ the cost of lights. If you only plan to grow cannabis occasionally, HIDs may fit the bill because of their cheaper initial cost.
● High initial cost.
Growth Cycle Stage
LED grow lights can also distribute a fuller light spectrum due to how the light is created through electroluminescence. This can result in a better, higher quality yield from your bud.
This is congruent with other findings that some added blue in flower will cause this. But the reason we see these amounts vary is because every strain reacts differently to different spectrums. Keep in mind that the cannabis plant grew in nature all over the world at different longitudes with different spectrums. With all of the variations of cannabis strains in today’s market made from these ancestral plants from all over the world, each will perform differently under different spectrums.
The bottom line that I can share with you, from my perspective where I get visibility to lots of opinions on the topic, see lots of sales and growth cycles, talk to lots of growers, is this: We are still in the investigative and development stage with LED technology in this sector.
Cannabis Research in Canada
Does this article answer our very first question? Let’s break it down and see. Upon further investigation, the crops in question were grown entirely under each light source. Not in a veg room under one type of light and then moved to flower. For this reason, the HPS plants stretched in veg and were not off to a healthy start!
No manufacturer , supplier, or customer can state they know the optimum LED recipe for cannabis (or tomato’s, or cucumbers, or orchids, etc.) as nobody has tested and tried multiple, different spectrums with each one being tuned to a specific strain or cultivar of each plant type to be able to render a quantifiable opinion.
Do this math with your LEDs as well. The PL Light TopLED is 320 watts so the BTUs will be 1092 BTUs. While that looks like a big savings it will take at least two times the amount of our LEDs to get to the same light level as a 1000w HPS. On the other side of this argument is that the LED fixtures do not provide the radiant heat as HPS and your crop roots will perform better with warmth. It is proven that there is a direct correlation between heat and crop production. Plants grow slower, producing less fruit the colder they are. In northern climates many growers rely on the heat from HPS to warm their crops.