Indoor Bonsai under LED lights.

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Re: Indoor Bonsai under LED lights.

Post  Dreamcast on Sat Aug 20, 2016 3:19 pm

There will be a new setup and test of new LEDs soon, but it will not be COBs!

Display Terrarium have been given away since it was to big and did not really fit in my small apartment, but custom ones are in the making and the new lights will compliment these very good i think, hope for a solid and final setup for me trees! more info and photos soon. Smile

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Re: Indoor Bonsai under LED lights.

Post  JWT on Thu Sep 15, 2016 6:46 pm

That will be interesting to see Dreamcast!

I just brought my Ligustum sinensis back inside and did some wiring and arranged a decent studio right there in the terrarium.



Under the spotlights there is a piece of white plastic bag to prevent overexposure. Two spots in the back are removed, so that background is in shade.

It is not perfect, but its ok. Some leaves are overexposed. Background is black canvas on a plate of wood. A spot or two from sides would be great to illuminate the trunk.

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Re: Indoor Bonsai under LED lights.

Post  Dreamcast on Sat Sep 17, 2016 11:46 am

Highly Inspiring ULTRA CLEAN work as always JWT!!  Shocked its a great idea to implement a studio right in there!

My new terrariums and setup overall will be very much like yours with just some small tweaks, the new LED lights are very thin so i should be able to maximize my area very well, hope to have everything up and ready in a month or so. Smile

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Re: Indoor Bonsai under LED lights.

Post  JWT on Sat Sep 17, 2016 2:36 pm

Dreamcast wrote:ULTRA CLEAN..

Yes fooled you didn't I. You can not see dust on the top glass, algae, fertilizer residues, dirty doors etc. Hardly clean any more  Wink.

Some kind of gimbal led spot system perhaps? Can't wait!

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Re: Indoor Bonsai under LED lights.

Post  mgamhov on Wed Dec 21, 2016 6:28 pm

hello im a bit new to bonsais, i bought one chinese elm this summer, and kept it inside, it did grow very well (54w) grow light (clear lens) par38 you know ebay e27 light. i dont like the purple so i bought a white led e27 par38 4000-4500k 36w 60 degree angle (its not a clear lens it is blurry like a diffuser lens to smoothen the light) and, it burnt the shit out of my leafs,...... Therefore i order one more 36w to compare with, with 4500k with transparent lens 60 degree, but when i compare the lights today, it is a huge diffrence in intensity... i have lux meter that can read 200.000lux

Readings:
At 32cm from light:
36w with diffuser lens 46.000lux
36w with clear lens 30.000lux

At 20cm from light:
36w with diffuser lens NOT READABLE....error
36w with clear lens 46.000lux

I can not understand the readings can this be true ?, i dont know how but the light seams to be 2x stronger with the diffused lens than with clear.... i have read the power draw and its the same for booth lights.. i dont know what to do right now i can not have the diffused light lower than 30cm from top of plant due to the strong light, the new cob led with clear lens get way less lux at the same hight, how high are your led on? Clear lens or some one have diffused ? i can take photos later of the lights and my tree!

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Re: Indoor Bonsai under LED lights.

Post  JWT on Wed Dec 21, 2016 7:02 pm

mgamhov wrote:hello im a bit new to bonsais, i bought one chinese elm this summer, and kept it inside, it did grow very well (54w) grow light (clear lens) par38 you know ebay e27 light. i dont like the purple so i bought a white led e27 par38 4000-4500k 36w 60 degree angle (its not a clear lens it is blurry like a diffuser lens to smoothen the light) and, it burnt the shit out of my leafs,...... Therefore i order one more 36w to compare with, with 4500k with transparent lens 60 degree, but when i compare the lights today, it is a huge diffrence in intensity... i have lux meter that can read 200.000lux

Readings:
At 32cm from light:
36w with diffuser lens 46.000lux
36w with clear lens 30.000lux

At 20cm from light:
36w with diffuser lens NOT READABLE....error
36w with clear lens 46.000lux

I can not understand the readings can this be true ?, i dont know how but the light seams to be 2x stronger with the diffused lens than with clear.... i have read the power draw and its the same for booth lights.. i dont know what to do right now i can not have the diffused light lower than 30cm from top of plant due to the strong light, the new cob led with clear lens get way less lux at the same hight, how high are your led on? Clear lens or some one have diffused ? i can take photos later of the lights and my tree!

My meter shows values over 100 000 LUX too, but is not accurate any more, because there seldom is a need for values higher than sunshine (about 100 000). 200 000 makes little sense.

You have the meter, just measure where the light is 80 000 - 100 000 LUX. That is rather optimal. If plant has been in lets say 30 000 LUX, leaves may burn because of sudden increase in intensity. Its like taking a tree from shadow to full sunshine all of a sudden.

I am too lazy to calculate, but generally speaking, when distance is halved, intensity is 4 times higher. So 46 klux@32cm => 224 klux@16cm. About 25cm should be OK.

Diffuser lense may have tighter optics (narrower beam). Seem to me those are good lights.


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Re: Indoor Bonsai under LED lights.

Post  Dreamcast on Wed Dec 21, 2016 8:16 pm

mgamhov wrote:hello im a bit new to bonsais, i bought one chinese elm this summer, and kept it inside, it did grow very well (54w) grow light (clear lens) par38 you know ebay e27 light. i dont like the purple so i bought a white led e27 par38 4000-4500k 36w 60 degree angle (its not a clear lens it is blurry like a diffuser lens to smoothen the light) and, it burnt the shit out of my leafs,...... Therefore i order one more 36w to compare with, with 4500k with transparent lens 60 degree, but when i compare the lights today, it is a huge diffrence in intensity... i have lux meter that can read 200.000lux

Readings:
At 32cm from light:
36w with diffuser lens 46.000lux
36w with clear lens 30.000lux

At 20cm from light:
36w with diffuser lens NOT READABLE....error
36w with clear lens 46.000lux

I can not understand the readings can this be true ?, i dont know how but the light seams to be 2x stronger with the diffused lens than with clear.... i have read the power draw and its the same for booth lights.. i dont know what to do right now i can not have the diffused light lower than 30cm from top of plant due to the strong light, the new cob led with clear lens get way less lux at the same hight, how high are your led on? Clear lens or some one have diffused ? i can take photos later of the lights and my tree!

JWT is right about 'Inverse Square Law' and it should apply equally to both lights no matter lenses or power draw, 4x +/- when ever the distances is double or half of the original reading, its no way around it.

I may have an idea what causes the "strange readings", some photos of the 2 LED spots will help to possibly verify my theory. Smile

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Re: Indoor Bonsai under LED lights.

Post  Dreamcast on Wed Dec 21, 2016 9:36 pm

JWT wrote:
Dreamcast wrote:ULTRA CLEAN..

Yes fooled you didn't I. You can not see dust on the top glass, algae, fertilizer residues, dirty doors etc. Hardly clean any more  Wink.

Some kind of gimbal led spot system perhaps? Can't wait!

Totally missed your reply..

Gimbal led spots actually looks kinda good, may have to look in to those some more.
The LEDs i will be testing are more of a proper T5 replacement with better efficiency and output, may also be testing some more lights, it remains to see what they send me, when they send it to me..

Have another project that involves cutting the 2 ApacheTech units in half so they can be used to light 2 rectangle size areas more effectively, photos and more info on this when i have built up courage enough to saw the massive heatsinks in half.. a little nervous.. Neutral


Last edited by Dreamcast on Thu Dec 22, 2016 1:05 am; edited 1 time in total

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Re: Indoor Bonsai under LED lights.

Post  AlainK on Wed Dec 21, 2016 11:17 pm

Really love the vintage radio...


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Re: Indoor Bonsai under LED lights.

Post  mgamhov on Thu Dec 22, 2016 5:08 pm

JWT wrote:
mgamhov wrote:hello im a bit new to bonsais, i bought one chinese elm this summer, and kept it inside, it did grow very well (54w) grow light (clear lens) par38 you know ebay e27 light. i dont like the purple so i bought a white led e27 par38 4000-4500k 36w 60 degree angle (its not a clear lens it is blurry like a diffuser lens to smoothen the light) and, it burnt the shit out of my leafs,...... Therefore i order one more 36w to compare with, with 4500k with transparent lens 60 degree, but when i compare the lights today, it is a huge diffrence in intensity... i have lux meter that can read 200.000lux

Readings:
At 32cm from light:
36w with diffuser lens 46.000lux
36w with clear lens 30.000lux

At 20cm from light:
36w with diffuser lens NOT READABLE....error
36w with clear lens 46.000lux

I can not understand the readings can this be true ?, i dont know how but the light seams to be 2x stronger with the diffused lens than with clear.... i have read the power draw and its the same for booth lights.. i dont know what to do right now i can not have the diffused light lower than 30cm from top of plant due to the strong light, the new cob led with clear lens get way less lux at the same hight, how high are your led on? Clear lens or some one have diffused ? i can take photos later of the lights and my tree!

My meter shows values over 100 000 LUX too, but is not accurate any more, because there seldom is a need for values higher than sunshine (about 100 000). 200 000 makes little sense.

You have the meter, just measure where the light is 80 000 - 100 000 LUX. That is rather optimal. If plant has been in lets say 30 000 LUX, leaves may burn because of sudden increase in intensity. Its like taking a tree from shadow to full sunshine all of a sudden.

I am too lazy to calculate, but generally speaking, when distance is halved, intensity is 4 times higher. So 46 klux@32cm => 224 klux@16cm. About 25cm should be OK.

Diffuser lense may have tighter optics (narrower beam). Seem to me those are good lights.


Well, as i am an electrician , i took a closer look to the lights we install and 80% of all the EXPENSIVE lights (spots) do have "diffuser lens" instead of clear lens were you can see the bulb, it looks like a fly´s eye.. the light gets well more smoother and does not leave "hotspots" as normal clear lenses. I took home one 7w cob spot 562 lumen from work and tested it, @32cm from light 11.500 lux, @16cm 40.000 lux, witch means your calc does work ! for me i have problem surrounding my tree with full light when i got one led (60 degree), thats why i need 2 peice of big spot 12cm diameter 18x2w leds, and it is 60degree to fully light up all branches!

My conclution, i will buy one more led with diffused lens, (left led on picture), due its well more light/lux than with the clear lens, i will have then have 2x 36w and that gives me 4000 lumen together, at 50cm distance one led gives me 23.000 lux at center, so 25 cm gets 92.000lux at the top of tree, i will start with high distance and lower them 1 cm every day. untill i get 25cm! i give some pictures, the led with solid silver base is the stronger LED with diffused lens! this light holder/plate is just a test for the light placement, i will build a nice one later were you cant acually see the led they will be build in a box, when i know how the tree gets exposed! i got some mesures on one of the pictures showing how big diffrense it is !









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Re: Indoor Bonsai under LED lights.

Post  mgamhov on Thu Dec 22, 2016 5:22 pm

i took apart one led light at my work and this is how a diffuser lens looks like up clodse, the pattern of this 7w 560 lumen (about 8cm diameter) is for 36 degree angle , pattern changes due to what degree angle the light spread. The last picture is from a 26w led with 3331 lumen (about 15cm diameter) i also put up a picture when it has been under the ebay grow light at last!









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Re: Indoor Bonsai under LED lights.

Post  pvinpvin on Thu Dec 29, 2016 2:06 am

Good thread!! I'm thinking about setting up a small system for my trees.

Has anyone tried growing Shimpakus indoor?

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Re: Indoor Bonsai under LED lights.

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