hi and welcome to the Migro YouTube channel my name is Shane and I'm the
founder of Migro if you've got an interest in horticulture lighting and
growing indoors then this should really be of interest to you because we're
going to look at the effects of different colored light and plant growth
we're doing a fairly rudimentary test and that we're testing white blue and
red light and its effect on plant growth but it should give you a good indication
of what different characteristics you'll get when growing under different colors
of light with your plants in this setup of the experiment we've been very
careful to make sure that the light intensity under the grow areas is
exactly the same for each of the setups so we've got three different setups
three different light colors but this is exactly the same light intensity to let
the canopy level of the plants so we've set them up with gar and bedding plants
and with lettuce so we've got flowering plants to look at the characteristics of
flowering that change with the light different lighting color and we've got
some lettuce which will show us about different levels of productivity and
we'll be able to take dry weights and all that sort of thing so we set up the
experiments some weeks ago so let's have a quick look at that you've got a
time-lapse grow then to go through and you'll see the the plants going up over
the last three weeks during the course of the experiment and then we're going
to look and see what we found at the other end and show you the results and
draw our conclusions from that so here goes
so let's have a look at each the growing bays we'll start in the full spectrum
Bay easier to inspect in the others so if we look at the front at the batting
plants we got the marigold here which continues to have one bloom and another
one just opening the begonia is doing quite well looking nice and healthy new
sprouts new shoots new growth sort of medium amount of flowers the
chrysanthemum is not doing anything at all it looks healthy and alive but not
flowering the lettuce on the other hand now is doing very well you can see down
the side it's kind of standing up it's quite thick dense growth you can see my
shoots coming up the inside so yeah doing well on the red side
you've got really nice flowers on the begonias looking healthy and in fact
dropping some petals so looking really good
the marigold is looking nice it's got an extra bloom just coming up and the
chrysanthemum is doing very little like the the white side you get to the
lettuce then that's quite different it's very rangy or stretchy it's hanging
over the edge here quite long and coming right down the side looking inside looks
lighter doesn't look as dense in terms of the growth on the blue side very
interestingly the marigold has one extra bloom here and a few other coming up so
it's doing well the begonias flowering quite healthy hasn't really grown to the
same extent and the chrysanthemum chrysanthemum as what the other ones
hasn't really done anything big difference here is in the lattice which
is
really light feathery it's not hasn't grown very much at all it's quite dense
growth hasn't stretched certainly but not looking very good let's take these
out and have a look at them under regular white lights so we can see them
side by side on the left is the full spectrum the middle the right the red
and the right to blue you can see that the full spectrum won't exposed to full
spectrum and red light are very similar the begonias have good amount of flowers
quite a lot of development to the plant the marigolds have developed a little
bit and are continuing to flower very very similar between the two big
differences though and the ones that were under blue light so the begonias
haven't developed as much at all and not as much flowering not as large flowers
not as large petals at not as large leaves however defying all expectations
the marigold has an increased numbers of flowers even though the plant growth is
less so a bit of an anomaly there was an expecting well here we have the lettuce
examples how to grow basil or white light on the left is the full spectrum
light the middle is the red light and the right one was under the blue let's
have a look at the closer the one under the full spectrum light has good leaf
color nice development inside the plant quite bushy you can see it's it's
standing up and quite thick growth there so looking very healthy and nice under
the red light much more stretched the paler color you can see the leaves
hanging down the sides there they're just not as thick and as as healthy and
you can see in the growth as you can see that there but quite a lot of stretching
up and down the stalk so a lot of productivity but not looking as
healthy as the full spectrum and then we get to the blue light which is really
dramatically different lots of color it's a very dark green and but very
restricted goat for development not not very impressive at all in comparison to
the other three so be interesting there to see what the weights are going to be
and so let's take the harvest and measure the wet lights and we have the
results from the weighing of the wet harvests we have the full spectrum grow
delivered 389 grams the red light grow delivered 409 grams so 5% of a
difference between them as near as makes no difference
we had a very poor result for the blue grow it was 168 grams so just half of
what the other two were in terms of yields are not really in the races at
all so very interesting between these two that they were so close by
considering that we had the same light levels hitting each of the grows to
deliver so closely was was very interesting certainly when you think
about the proportion of green light in the full spectrum the view is about the
place that the green light is is useless and and and it doesn't photosynthesize
and has no effect at all well if that were the case we'd likely to be 30 or 40
percent down on the full spectrum grow but as as most of the science backs up
you know all of the photons contribute to growth just some
contribute more than others and in this case there's a very clear
differentiation with the blue light where some is good it gives a balanced
growth it gives you a higher density they're shorter internodal spacing that
sort of thing but too much is is non-productive so
keep it down to a minimum and the conventional wisdom is is somewhere
around 15 to 20 percent of blue light will be sufficient to keep your growth
contact compact and dense would be as productive and efficient as possible so
some of the other characteristics just again briefly is is the short dense
growth under the blue light short intermodal spacing smaller leaf and
flower size we got the red flowers the red light you know seem to deliver a
little bit more in the flowering side larger leaf size larger petal size high
productivity but the downside is is the stretching and then we have the full
spectrum light where we have good good productivity good dense growth and nice
coloring healthy appearance medium petal and flower size very close to the the
red in terms of flowering but overall producing the most most desirable result
ready so we hope you enjoyed it's a fairly basic experiment but hopefully
gives you a good feel for the effects of different colored light on growing and
we're going to explore the topic further but more civil nuanced variances in the
light recipe to plants to see which ones are optimum or what differences you get
from from changing the recipe so I hope you enjoyed if you did please subscribe
and take care