Tropical Fruit Forum - International Tropical Fruit Growers



Author Topic: Indoor citrus, Lighting length time and warmth ??  (Read 691 times)

franklazar26

  • Member
  • ***
  • Posts: 125
    • WI, Zone 5A
    • View Profile
Indoor citrus, Lighting length time and warmth ??
« on: October 26, 2019, 10:56:19 AM »
Hello!

I just finally went big rather than going cheapo and purchasing 5$ grow lights at the hardware store. I purchased a WHOSLED 600W that puts out around 1200 umol/s/m2, and a smaller 2FT T5 bulb set for my seedlings.. How long should I run these lights for the maximum yield of growth while still not racking up a huge energy bill? Looking for opinions! I also have a germination mat underneath both keeping the roots at a good 78-83 degrees F. The surrounding temps go anywhere from 68-76F throughout the day into the night (may get a little warmer with the more powerful lights I'm putting in). What are your guys' opinions? I currently have over 50 citrus seedlings coming consisting of trifoliate, FD, and swindle, along with some misc dwarf poms and coffee.

Thanks for any input!

usirius

  • Member
  • ***
  • Posts: 165
  • Never give up!
    • Southern Germany, 7b
    • View Profile
Re: Indoor citrus, Lighting length time and warmth ??
« Reply #1 on: October 26, 2019, 03:46:18 PM »
Hello franlazar26, 600 watts for which area to shine? And do you also know the lumen number? I would hang the lamp at least 1-2 meters above the plants to avoid burns. If you cultivate the plants outdoors in summer, you can now go back with the light ON time (day length) even in artificial light. But you can leave 1 hour longer in the morning and 1 hour longer in the evening, so that you have in any case more madness as with a low-light wintering. Of course, if you still have coffee with you...then 11-12 hours of day length (light on time) would not be bad.
„May your choices reflect your hopes, not your fears.“ N. Mandela

franklazar26

  • Member
  • ***
  • Posts: 125
    • WI, Zone 5A
    • View Profile
Re: Indoor citrus, Lighting length time and warmth ??
« Reply #2 on: October 26, 2019, 10:08:08 PM »
Hello franlazar26, 600 watts for which area to shine? And do you also know the lumen number? I would hang the lamp at least 1-2 meters above the plants to avoid burns. If you cultivate the plants outdoors in summer, you can now go back with the light ON time (day length) even in artificial light. But you can leave 1 hour longer in the morning and 1 hour longer in the evening, so that you have in any case more madness as with a low-light wintering. Of course, if you still have coffee with you...then 11-12 hours of day length (light on time) would not be bad.
The pack I have says 8268.6lm. Around 1200 PAR from 18" in height (right around .5m I believe). Note I forgot to say, they do not receive any natural sunlight! They're kept in a closet currently so the light is all the light they will have. I am going to start it at 12 hours a day and go from there though I think!

Thanks!

Millet

  • Moderator
  • Hero Member
  • *****
  • Posts: 3555
    • Colorado
    • View Profile
Re: Indoor citrus, Lighting length time and warmth ??
« Reply #3 on: October 26, 2019, 10:35:46 PM »
I use a Metal Halide light.  When I light a citrus tree, I turn the light on near sunset, and turn the light off at 10:30 (when I go to bed).  I put the light 12" above the tree.

Ilya11

  • Hero Member
  • *****
  • Posts: 673
    • France, Paris region, Vaux le Penil, middle of Northern z8
    • View Profile
Re: Indoor citrus, Lighting length time and warmth ??
« Reply #4 on: October 27, 2019, 04:25:39 AM »
In artificial enclosure with white reflecting paper I keep 18 hours of light per day. For the seedlings around 5000 lumen at the soil level is sufficient for growth( measured by Lux Meter Level application). Make sure that temperature do not exceed 30C.
Best regards,
                       Ilya

franklazar26

  • Member
  • ***
  • Posts: 125
    • WI, Zone 5A
    • View Profile
Re: Indoor citrus, Lighting length time and warmth ??
« Reply #5 on: October 27, 2019, 05:44:09 PM »
Here is my light, I am choosing to keep it on about 11 hours. From a cool test run today of 10 hours it made the temps around go from 67 to 80 within that time frame, also it was with all lights going, at full blast. It has the ability to switch on and off certain lighting (blue, red, IR) Again it will be enclosed in this closet the entire time with no natural light. I am also choosing to change the cycle of lighting while I sleep as the wife hates the closet illuminated so brightly by this new intensity haha. So it will be on from approx 8:00pm till 7:00 am. It is a very intense light and my plants seemed to like the distance. The mango leaf even grew 1 cm today alone! (I measured). I am wondering if you guys think I should put in a small fan to create better air circulation? I did not use the fan in the background at all, it is a little too powerful for the small closet. I dont want the heat to become hazardous. Also would I be able to get away with just running blue to keep the power consumption as well as heat down? All I have are saplings and small trees! Thank you guys for the help and tips!







SeaWalnut

  • Hero Member
  • *****
  • Posts: 930
    • Romania zone 6
    • View Profile
Re: Indoor citrus, Lighting length time and warmth ??
« Reply #6 on: October 27, 2019, 05:53:46 PM »
I use a Metal Halide light.  When I light a citrus tree, I turn the light on near sunset, and turn the light off at 10:30 (when I go to bed).  I put the light 12" above the tree.
Metal halide light is the best but consumes a lot of current.
Second after MH are the T8 tubes ,then T5 and the last with the worst type of light are the LEDs ( any of them).
I wonder if the sodium lamps have a good spectrum for plant growth.They are somewhat like MH but contain only sodium and they give a lot of light .
Xenon lamps are better than even MH and they give a light per watt just like LEDs.The downside is their too expensive , not easy to find replacement bulbs and the bulbs usually last @10 months lighted 12 hours a day.

SeaWalnut

  • Hero Member
  • *****
  • Posts: 930
    • Romania zone 6
    • View Profile
Re: Indoor citrus, Lighting length time and warmth ??
« Reply #7 on: October 27, 2019, 06:00:08 PM »
Here is my light, I am choosing to keep it on about 11 hours. From a cool test run today of 10 hours it made the temps around go from 67 to 80 within that time frame, also it was with all lights going, at full blast. It has the ability to switch on and off certain lighting (blue, red, IR) Again it will be enclosed in this closet the entire time with no natural light. I am also choosing to change the cycle of lighting while I sleep as the wife hates the closet illuminated so brightly by this new intensity haha. So it will be on from approx 8:00pm till 7:00 am. It is a very intense light and my plants seemed to like the distance. The mango leaf even grew 1 cm today alone! (I measured). I am wondering if you guys think I should put in a small fan to create better air circulation? I did not use the fan in the background at all, it is a little too powerful for the small closet. I dont want the heat to become hazardous. Also would I be able to get away with just running blue to keep the power consumption as well as heat down? All I have are saplings and small trees! Thank you guys for the help and tips!






Plants use verry little blue .Use red or the pink one and not blue at all.The pink light you call IR is actually a UV wannabee( UVA) and that has both blue and red in it.
LEDS cant output real UV like UVC  and UVB because these lights are the ones that cause sunburn and would destroy the plastic LEDs in just a few hours.

franklazar26

  • Member
  • ***
  • Posts: 125
    • WI, Zone 5A
    • View Profile
Re: Indoor citrus, Lighting length time and warmth ??
« Reply #8 on: October 27, 2019, 06:10:56 PM »
Here is my light, I am choosing to keep it on about 11 hours. From a cool test run today of 10 hours it made the temps around go from 67 to 80 within that time frame, also it was with all lights going, at full blast. It has the ability to switch on and off certain lighting (blue, red, IR) Again it will be enclosed in this closet the entire time with no natural light. I am also choosing to change the cycle of lighting while I sleep as the wife hates the closet illuminated so brightly by this new intensity haha. So it will be on from approx 8:00pm till 7:00 am. It is a very intense light and my plants seemed to like the distance. The mango leaf even grew 1 cm today alone! (I measured). I am wondering if you guys think I should put in a small fan to create better air circulation? I did not use the fan in the background at all, it is a little too powerful for the small closet. I dont want the heat to become hazardous. Also would I be able to get away with just running blue to keep the power consumption as well as heat down? All I have are saplings and small trees! Thank you guys for the help and tips!






Plants use verry little blue .Use red or the pink one and not blue at all.The pink light you call IR is actually a UV wannabee( UVA) and that has both blue and red in it.
LEDS cant output real UV like UVC  and UVB because these lights are the ones that cause sunburn and would destroy the plastic LEDs in just a few hours.

Okay thanks! I thought blue was for vegetative growth and red was for blooming or something on the line of that? But okay, makes sense. So if I were not to want to run all the LEDs at once (purple), to pick one over the other I should run red over blue? My only concern with running purple is that it creates a much higher heat output than if I were to use one or the other.

brian

  • Hero Member
  • *****
  • Posts: 1155
    • Pennsylvania (zone 6)
    • View Profile
Re: Indoor citrus, Lighting length time and warmth ??
« Reply #9 on: October 30, 2019, 01:01:10 PM »
Is the "600W" light actually 600 Watts, or "600 watt equivalent" which is common with CFL and LEDs? 

I recently bought a "1200W equivalent" LED light fixture which the fine print says consumes ~200-250W power.  It was $90 on amazon.  Yours is likely similar if it is LED.  A true 600 watts-consumed LED fixture would likely cost $300+ and I've never actually seen one rated above 1500-watt-equivalent

I don't have any citrus under mine yet, only my wife's cooking herbs and a couple random seedlings I had extras of - lychee and ice cream bean.  They are growing well under the light, but it is too early for me to tell how they compare to the same seedlings in my greenhouse under only natural light.

I have my light running 16hrs a day on a timer, it is in my basement which is around 65F all year.  The light doesn't create enough heat to notice as it is in a wide open area.   200W 16hrs/day is under ten bucks a month in power cost

200Watts = 0.2 kilowatt-hours
power is ~10c kilowatt-hour
30 days a month, 16hrs a day
.200 * .10 * 30 * 16

$9.60
« Last Edit: October 30, 2019, 01:05:22 PM by brian »

franklazar26

  • Member
  • ***
  • Posts: 125
    • WI, Zone 5A
    • View Profile
Re: Indoor citrus, Lighting length time and warmth ??
« Reply #10 on: October 30, 2019, 01:40:15 PM »
Is the "600W" light actually 600 Watts, or "600 watt equivalent" which is common with CFL and LEDs? 

I recently bought a "1200W equivalent" LED light fixture which the fine print says consumes ~200-250W power.  It was $90 on amazon.  Yours is likely similar if it is LED.  A true 600 watts-consumed LED fixture would likely cost $300+ and I've never actually seen one rated above 1500-watt-equivalent

I don't have any citrus under mine yet, only my wife's cooking herbs and a couple random seedlings I had extras of - lychee and ice cream bean.  They are growing well under the light, but it is too early for me to tell how they compare to the same seedlings in my greenhouse under only natural light.

I have my light running 16hrs a day on a timer, it is in my basement which is around 65F all year.  The light doesn't create enough heat to notice as it is in a wide open area.   200W 16hrs/day is under ten bucks a month in power cost

200Watts = 0.2 kilowatt-hours
power is ~10c kilowatt-hour
30 days a month, 16hrs a day
.200 * .10 * 30 * 16

$9.60

Oh yes, its claimed to be around 124w consumption, although comments have said it consumes more around the 200w at full blast. So far running it 12 hours at night I have seen substantial growth from my seedlings! I am happy with the light overall. But that's not bad in power price either, although I do have a fan going, 2 germination mats, and another LED for my seedlings. Either way, all work great!

brian

  • Hero Member
  • *****
  • Posts: 1155
    • Pennsylvania (zone 6)
    • View Profile
Re: Indoor citrus, Lighting length time and warmth ??
« Reply #11 on: October 30, 2019, 03:03:53 PM »
Cool, sounds similar to mine.  I am curious how it turns out, if seedlings grow faster this way during the winter I will keep them under lights until spring. 

Millet

  • Moderator
  • Hero Member
  • *****
  • Posts: 3555
    • Colorado
    • View Profile
Re: Indoor citrus, Lighting length time and warmth ??
« Reply #12 on: October 30, 2019, 04:57:23 PM »
I posted some years back about an in ground Dekopon, that was planted as a small grafted starter tree.  I surrounded the tree with silver sided insulation boards just for the light's reflection back onto the tree, heated the soil to 80F (26.6C) with an under ground heating coil, and use a metal halide light from sunset until 10:30PM.  That tree had 5 flushes of growth each year for the next two years.  The tree is now 5-ft. tall and 5-ft. wide, and producing a nice crop.
« Last Edit: October 30, 2019, 04:59:28 PM by Millet »

poncirsguy

  • Newbie
  • *
  • Posts: 2
    • Cincinnati, Ohio, USA, 6a/6b
    • View Profile
Re: Indoor citrus, Lighting length time and warmth ??
« Reply #13 on: November 27, 2019, 08:15:21 PM »
I use the cheapest lighting available.  run it for 16-18 hours per day








Millet

  • Moderator
  • Hero Member
  • *****
  • Posts: 3555
    • Colorado
    • View Profile
Re: Indoor citrus, Lighting length time and warmth ??
« Reply #14 on: November 28, 2019, 03:40:33 PM »
Welcome to the citrus forum Poncirsguy.

Bomand

  • Sr. Member
  • ****
  • Posts: 476
    • LouisianaCFDFMY
    • View Profile
Re: Indoor citrus, Lighting length time and warmth ??
« Reply #15 on: November 28, 2019, 07:53:12 PM »
Welcome Poncirusguy. Remember your many post.

Vlad

  • Member
  • ***
  • Posts: 149
    • Medway, MA zone 6a
    • View Profile
Re: Indoor citrus, Lighting length time and warmth ??
« Reply #16 on: November 28, 2019, 10:40:46 PM »
Steve, how did you attach the overhead lights in the first picture.
Good to see you here on this forum.

 

Copyright © Tropical Fruit Forum - International Tropical Fruit Growers