eye horitulux hps for veg??
- Thread starter scrubby
- Start date
genuity
Well-Known Member
it works,makes plants grow tall
CLOSETGROWTH
Well-Known Member
Best Bulb on the market, especially the eye Hortilux 1000 hps. The cadillac of grow lights 
luvvin growin
Active Member
The enhanced blue spectrum of the Eye Hortilux does great for vegetative plants.Its the bulb I use,and I've used them all.I like it the best.
luvvin growin
Active Member
welcome,and any time,its why I'm here,anyways...
CLOSETGROWTH
Well-Known Member
luvvin growin
Active Member
Amen to that,just dont like to speak out the side of my neck.Thats why WE'RE here
Hobbes
Well-Known Member
.
Scrubby I have to give a decenting opinion. A 2100K light (HPS - 2200K for Eye?) will make your plants stretch - longer internode space. You get less nodes per foot which means less branches which means less bud.
If you use HPS watch the internode space, take some measurements, and compare this with a higher K light later on. It will spook you.
IMO excessive stretch is one of the 7 deadly sins of growing, making gardening more difficult and cutting yield and overall potency (buds at the bottom of the plant). I don't know what the other 6 deadly sins of marijuana gardening are. Sorry.
I use a 14,000K light during early veg, switching to a 2100K for the last two weeks before flower. I left my last 9 seedlings under 2100K for the first few weeks, the nodes were 4"-6" apart. I built a second veg box and under 14,000K the nodes are ~1".
I would advise a higher K light than your HPS for veg, but if you go with the HPS you'll get fine bud. Just less of it and it will be more difficult to garden.
.
Scrubby I have to give a decenting opinion. A 2100K light (HPS - 2200K for Eye?) will make your plants stretch - longer internode space. You get less nodes per foot which means less branches which means less bud.
If you use HPS watch the internode space, take some measurements, and compare this with a higher K light later on. It will spook you.
IMO excessive stretch is one of the 7 deadly sins of growing, making gardening more difficult and cutting yield and overall potency (buds at the bottom of the plant). I don't know what the other 6 deadly sins of marijuana gardening are. Sorry.
I use a 14,000K light during early veg, switching to a 2100K for the last two weeks before flower. I left my last 9 seedlings under 2100K for the first few weeks, the nodes were 4"-6" apart. I built a second veg box and under 14,000K the nodes are ~1".
I would advise a higher K light than your HPS for veg, but if you go with the HPS you'll get fine bud. Just less of it and it will be more difficult to garden.
.
CLOSETGROWTH
Well-Known Member
Higher K light? LOL! Eye Hortilux is the best bulb on the market. Ill bet 80% of high end growers use this brand. I never had ANY stretch using them. Bushes to the max everytime. A true performer. Hortilux Hps all the way from veg to Harvest.. Never will do ya wrong. You may have an opinion, And Im giving you facts. This picture of a plant grown under a hortilux will reveal no internode spacing/stretch, thick as a brick..
Scrubby I have to give a decenting opinion. A 2100K light (HPS - 2200K for Eye?) will make your plants stretch - longer internode space. You get less nodes per foot which means less branches which means less bud.
If you use HPS watch the internode space, take some measurements, and compare this with a higher K light later on. It will spook you.
IMO excessive stretch is one of the 7 deadly sins of growing, making gardening more difficult and cutting yield and overall potency (buds at the bottom of the plant). I don't know what the other 6 deadly sins of marijuana gardening are. Sorry.
I use a 14,000K light during early veg, switching to a 2100K for the last two weeks before flower. I left my last 9 seedlings under 2100K for the first few weeks, the nodes were 4"-6" apart. I built a second veg box and under 14,000K the nodes are ~1".
I would advise a higher K light than your HPS for veg, but if you go with the HPS you'll get fine bud. Just less of it and it will be more difficult to garden.
.
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Hobbes
Well-Known Member
.
Closet Grower I would wager that your ability to keep your internode distance short is more of a tribute to your growing skill than the Super HPS' most excellent enhanced spectrum. Optimal light distance while keeping the plants cool, nutrition, minimizing stress, etc.
While the Super HPS has a great spectrum it is still only a 2200K light, there will be more stretch than if using a Hortilux Daylight MH under the same conditions. I have both, I can't believe the Super HPS is only 2200 K (Hortilux spec sheet has it at 2100K but I've seen it as 2200K). It looks so bright and clear, none of the yellow with my last bulb.
"This picture of a plant grown under a hortilux will reveal no internode spacing/stretch, thick as a brick."
I can't argue with that picture, some beautiful bud. Kudos.
ps what strain? What style of grow? From seed or clone? Spectacular plant.
I agree that an enhanced HPS can be used by an experienced grower with minimal stretch during veg. The optimal conditions needed will be much harder for an inexperienced grower to reproduce and maintain, this is why I suggest a more forgiving MH or high K light during veg.
.
What is stretch and how can I minimize it?
by Snoofer
.
Closet Grower I would wager that your ability to keep your internode distance short is more of a tribute to your growing skill than the Super HPS' most excellent enhanced spectrum. Optimal light distance while keeping the plants cool, nutrition, minimizing stress, etc.
While the Super HPS has a great spectrum it is still only a 2200K light, there will be more stretch than if using a Hortilux Daylight MH under the same conditions. I have both, I can't believe the Super HPS is only 2200 K (Hortilux spec sheet has it at 2100K but I've seen it as 2200K). It looks so bright and clear, none of the yellow with my last bulb.
"This picture of a plant grown under a hortilux will reveal no internode spacing/stretch, thick as a brick."
I can't argue with that picture, some beautiful bud. Kudos.
ps what strain? What style of grow? From seed or clone? Spectacular plant.
I agree that an enhanced HPS can be used by an experienced grower with minimal stretch during veg. The optimal conditions needed will be much harder for an inexperienced grower to reproduce and maintain, this is why I suggest a more forgiving MH or high K light during veg.
.
What is stretch and how can I minimize it?
by Snoofer
“Stretch” is a term for the natural vertical growth spurt in early flowering. Marijuana will grow in height throughout its flowering phase, but the first 2 weeks of flowering will show the most dramatic change in height and internodal distance. Stretch can also occur in the vegetative phase.
Stretch is generally considered an unavoidable evil, but some gardeners prefer a bit of stretch to allow budsites to fill in adequately. Buds with perfect density can be grown by controlling stretch.
Encouraging stretch can be a good technique to prevent budrot in susceptible strains and massive colas. Elongated buds are less dense, and the humidity within buds is reduced.
Note: Males will typically stretch much more than females and are easily identified and pre-sexxed by their extra height.
Why is stretch a problem?
Stretch is a problem primarily in indoor grows because it greatly reduces yield. The problem stems from the limitations of artificial light and the plant’s adaptations to low light.
Stretch also produces tall plants with weak and spindly stems. The weight of the buds later in flower will require staking to avoid damage and falling over. Stretch may be a sudden problem for growers with limited ceiling height.
Light intensity vs internodal distance
Light intensity diminishes exponentially with distance under artificial light (the inverse squared law). Sunlight is not affected by distance and can penetrate deep into a canopy.
Marijuana requires high light levels (At least 30w/m2, preferably 50 w/m2) to thrive and produce high yields. A plant is at its optimum flowering height when all it’s bud sites are bathed in intense light (ideally the entire plant is equally lit, producing dense bud from top to bottom).
Stretched plants are tall and their lower bud sites receive exponentially lower lumens than top colas. Budsites that are not receiving intense light will not produce well, and often the light and extra plant height is wasted. Tall plants require more energy to pump water to its leaves and transport photosynthate from its leaves. This extra energy could have gone into flowering. Stretched plants can yield 30-50% less.
Lower bud sites that are not illuminated sufficiently will produce under-developed buds: airy or popcorn bud. Popcorn buds have lower dry weight, take much longer to trim, and often have less bag appeal.
How can I minimize stretch?
Use blue-spectrum light
Using MH light exclusively during vegetative and early flower phases will help keep internodal length shorter.
Note: Some of these techniques only apply to the stretch phase.
Use a compact strain
Indicas tend to have minimal stretch growing characteristics in flower compared to tall-growing Sativas. Hybrids may grow unevenly, or react to stress unexpectedly.
Keep light at the optimum distance
Low light levels will cause seedlings and plants to stretch and produce poorly.
from: http://www.hrt.msu.edu/course/HRT100/lec8.htm
“….High light inhibits plant growth - plants tend to grow taller when there is less light."
Use adequate spacing
Very high planting densities will encourage stretch. As the plant grows, its leaves will quickly overlap its neighbors. Eventually the sub-canopy will darken and lower portions of the plant will experience significant shading.
from: http://ohioline.osu.edu/sc154/sc154_17.html
"Overlapping of plant parts reduces light intensity and changes light quality, resulting in light below plant canopies that is richer in near-infrared and far-red which encourages plant stretching."
Pruning, FIM'ing and topping
Pruning plants in veg and early flower can effect the flow of auxins within the plant. Re-distributing natural growth hormones from terminal shoots to lateral shoots is a good way to slow height growth.
Note: Pruning in SOG systems is not recommended, as this promotes bushiness.
From: What do all of those lighting terms mean?
“The light produced by metal halide lamps is in the white-blue spectrum, which encourages vegetative growth and "bushiness" while discouraging upward growth. This is the bulb to use in the first, vegetative phase of plant growth.”
HPS bulbs are the preferred lighting source for flowering. However, most HPS bulbs have a harsh and limited light spectrum concentrated in the far red and IR that encourages stretching.
Growers have a variety of bulb options to increase blue light during the vegetative and early flowering phase:
Supplemental fluorescents
MH bulbs, or a mix of HPS to MH (3:1 recommended)
Conversion bulbs (MH bulbs that work with HPS ballasts)
Enhanced HPS (the author acknowledges your point CG)
Minimize night/day temperature fluctuations
According to Cannabis Culture : (http://www.cannabisculture.com/articles/1536.html)
"Plant internodal length is directly related to the difference between day and night temperatures – the warmer your day cycle is as compared to your night cycle, the greater your internode length will be. The opposite also holds true; the closer your day and night temperatures, the shorter your internodes will be."
Minimize stress
Stretching can be a physiological reaction to a variety of environmental stresses (Low light, high humidity, low/high temperatures, transplant shock, leaf loss, etc). Maintaining optimum growing conditions is your best defense against stretch.
Anti-stretch additives
SuperBud is a popular additive to help minimize stretch and initiate flowering faster. See faq: What is Superbud?
Bonza Bud (contains antigibberillins) shortens internode length while helping the predominance of female flowers.
Growth retardants:
http://www.ext.vt.edu/pubs/greenhouse/430-102/430-102.html#L4
Avoid hormones
Some foliar sprays and additives can encourage stretch. Spraying Growth Plus (containing cytokines and vitamins) during early flower may encourage stretch. "Cytokinine - activates cell stretching..."
Use side lighting (vertical bulbs)
Untested. The Phototropic effects of side lighting may limit the amount of stretch: “…dark side of the stem grows more than the lit side of the stem.” (http://www.hrt.msu.edu/course/HRT100/lec8.htm)
Grower's tricks
Use MH lights during vegging and the first 2 weeks of flowering (during the stretch phase) to minimize stretch.
I disagree with using mh during the first two weeks of flower, the high K will extend veg. A 2100K light during the first 2 weeks of 12/12 helps to speed transition into flower, and in my experience lessens overall stretch in flower.
Avoid high levels of Nitrogen during the stretch. Use a transition fertilizer ratio (2-2-2) during early flowering to maintain a medium level of Nitrogen.
Note: Switching immediately to a flowering ratio from veg can result in premature yellowing. Remember to flush soil out/change the reservoir to remove any high-N fertilizers.
Use oscillating fans to help strengthen stems
OverGrow Links:
why do my seedlings stretch?
What distance should my light be from my plants?
Vegetative growth>Training/Pruning folder
What do hormones/growth regulators contain?
What are hormones and what do they do?
Stretch is generally considered an unavoidable evil, but some gardeners prefer a bit of stretch to allow budsites to fill in adequately. Buds with perfect density can be grown by controlling stretch.
Encouraging stretch can be a good technique to prevent budrot in susceptible strains and massive colas. Elongated buds are less dense, and the humidity within buds is reduced.
Note: Males will typically stretch much more than females and are easily identified and pre-sexxed by their extra height.
Why is stretch a problem?
Stretch is a problem primarily in indoor grows because it greatly reduces yield. The problem stems from the limitations of artificial light and the plant’s adaptations to low light.
Stretch also produces tall plants with weak and spindly stems. The weight of the buds later in flower will require staking to avoid damage and falling over. Stretch may be a sudden problem for growers with limited ceiling height.
Light intensity vs internodal distance
Light intensity diminishes exponentially with distance under artificial light (the inverse squared law). Sunlight is not affected by distance and can penetrate deep into a canopy.
Marijuana requires high light levels (At least 30w/m2, preferably 50 w/m2) to thrive and produce high yields. A plant is at its optimum flowering height when all it’s bud sites are bathed in intense light (ideally the entire plant is equally lit, producing dense bud from top to bottom).
Stretched plants are tall and their lower bud sites receive exponentially lower lumens than top colas. Budsites that are not receiving intense light will not produce well, and often the light and extra plant height is wasted. Tall plants require more energy to pump water to its leaves and transport photosynthate from its leaves. This extra energy could have gone into flowering. Stretched plants can yield 30-50% less.
Lower bud sites that are not illuminated sufficiently will produce under-developed buds: airy or popcorn bud. Popcorn buds have lower dry weight, take much longer to trim, and often have less bag appeal.
How can I minimize stretch?
Use blue-spectrum light
Using MH light exclusively during vegetative and early flower phases will help keep internodal length shorter.
Note: Some of these techniques only apply to the stretch phase.
Use a compact strain
Indicas tend to have minimal stretch growing characteristics in flower compared to tall-growing Sativas. Hybrids may grow unevenly, or react to stress unexpectedly.
Keep light at the optimum distance
Low light levels will cause seedlings and plants to stretch and produce poorly.
from: http://www.hrt.msu.edu/course/HRT100/lec8.htm
“….High light inhibits plant growth - plants tend to grow taller when there is less light."
Use adequate spacing
Very high planting densities will encourage stretch. As the plant grows, its leaves will quickly overlap its neighbors. Eventually the sub-canopy will darken and lower portions of the plant will experience significant shading.
from: http://ohioline.osu.edu/sc154/sc154_17.html
"Overlapping of plant parts reduces light intensity and changes light quality, resulting in light below plant canopies that is richer in near-infrared and far-red which encourages plant stretching."
Pruning, FIM'ing and topping
Pruning plants in veg and early flower can effect the flow of auxins within the plant. Re-distributing natural growth hormones from terminal shoots to lateral shoots is a good way to slow height growth.
Note: Pruning in SOG systems is not recommended, as this promotes bushiness.
From: What do all of those lighting terms mean?
“The light produced by metal halide lamps is in the white-blue spectrum, which encourages vegetative growth and "bushiness" while discouraging upward growth. This is the bulb to use in the first, vegetative phase of plant growth.”
HPS bulbs are the preferred lighting source for flowering. However, most HPS bulbs have a harsh and limited light spectrum concentrated in the far red and IR that encourages stretching.
Growers have a variety of bulb options to increase blue light during the vegetative and early flowering phase:
Supplemental fluorescents
MH bulbs, or a mix of HPS to MH (3:1 recommended)
Conversion bulbs (MH bulbs that work with HPS ballasts)
Enhanced HPS (the author acknowledges your point CG)
Minimize night/day temperature fluctuations
According to Cannabis Culture : (http://www.cannabisculture.com/articles/1536.html)
"Plant internodal length is directly related to the difference between day and night temperatures – the warmer your day cycle is as compared to your night cycle, the greater your internode length will be. The opposite also holds true; the closer your day and night temperatures, the shorter your internodes will be."
Minimize stress
Stretching can be a physiological reaction to a variety of environmental stresses (Low light, high humidity, low/high temperatures, transplant shock, leaf loss, etc). Maintaining optimum growing conditions is your best defense against stretch.
Anti-stretch additives
SuperBud is a popular additive to help minimize stretch and initiate flowering faster. See faq: What is Superbud?
Bonza Bud (contains antigibberillins) shortens internode length while helping the predominance of female flowers.
Growth retardants:
http://www.ext.vt.edu/pubs/greenhouse/430-102/430-102.html#L4
Avoid hormones
Some foliar sprays and additives can encourage stretch. Spraying Growth Plus (containing cytokines and vitamins) during early flower may encourage stretch. "Cytokinine - activates cell stretching..."
Use side lighting (vertical bulbs)
Untested. The Phototropic effects of side lighting may limit the amount of stretch: “…dark side of the stem grows more than the lit side of the stem.” (http://www.hrt.msu.edu/course/HRT100/lec8.htm)
Grower's tricks
Use MH lights during vegging and the first 2 weeks of flowering (during the stretch phase) to minimize stretch.
I disagree with using mh during the first two weeks of flower, the high K will extend veg. A 2100K light during the first 2 weeks of 12/12 helps to speed transition into flower, and in my experience lessens overall stretch in flower.
Avoid high levels of Nitrogen during the stretch. Use a transition fertilizer ratio (2-2-2) during early flowering to maintain a medium level of Nitrogen.
Note: Switching immediately to a flowering ratio from veg can result in premature yellowing. Remember to flush soil out/change the reservoir to remove any high-N fertilizers.
Use oscillating fans to help strengthen stems
OverGrow Links:
why do my seedlings stretch?
What distance should my light be from my plants?
Vegetative growth>Training/Pruning folder
What do hormones/growth regulators contain?
What are hormones and what do they do?
.