neverforget4/20
Member
Ya agree but i wonder if the puny output from reptile bulbs would take any meaningful advantage of the uv reflective surfaces.
The single 4' t5 plainly has an effect on the canopy in my setup.
-
As of today ICMag has his own Discord server. In this Discord server you can chat, talk with eachother, listen to music, share stories and pictures...and much more. Join now and let's grow together! Join ICMag Discord here! More details in this thread here: here.
uv reflective paint
- Thread starter biggreg
- Start date
Ya agree but i wonder if the puny output from reptile bulbs would take any meaningful advantage of the uv reflective surfaces.
The single 4' t5 plainly has an effect on the canopy in my setup.
neverforget4/20
Member
http://growagromax.com/products/4ft-pure-series/
Seems like this is the simplest, best current uv tube. Ive used the arcadia and the hortilux both are effective. The agromax is new to me.
Seems like this is the simplest, best current uv tube. Ive used the arcadia and the hortilux both are effective. The agromax is new to me.
biggreg
Member
Awesome! Didn't know about the argomax. Cool.
Anyone played with these new metal halide UV lamps? They look to add lots of PAR lighting as well with spikes of red. http://www.exo-terra.com/en/products/sunray_fixture.php
Anyone played with these new metal halide UV lamps? They look to add lots of PAR lighting as well with spikes of red. http://www.exo-terra.com/en/products/sunray_fixture.php
Shmavis
Being-in-the-world
Nice breakdown. Always helps to put things in perspective.
If the numbers hold (coverage & reflectivity), then that cost isn’t as offensive as it first seems.
subrovka
Member
under terrarium owners, this UV lamp is highly recommended:
http://www.amazon.com/ULTRA-VITALUX-OSRAM-MEDICAL-TANNING/dp/B003XVSWP8
(pretty expensive though.. these bulb costs only 40€/45$ in my area..)
the spectrum is close to sun light in the highlands, the output is very powerful and stimulates the vitamin d3 synthesis of reptiles even from distances up to 1m.
i tried it on myself, you def get tanned from this one by just sitting about 1m next to it for 20-30 min..
these reptile CFL bulbs are a waste of time and money, as their output in UV-B is way to low..it would effect reptiles only from short distances of maybe 20cm(so maybe ok for very small terrariums/animals). and plants, especially cannabis, can take even more UV-B than most animals.
http://www.uvguide.co.uk/lightingsurveyintro.htm
http://www.uromastyx-ocellata.de/?id=wissenswertes/uvbeleuchtung
http://www.amazon.com/ULTRA-VITALUX-OSRAM-MEDICAL-TANNING/dp/B003XVSWP8
(pretty expensive though.. these bulb costs only 40€/45$ in my area..)
the spectrum is close to sun light in the highlands, the output is very powerful and stimulates the vitamin d3 synthesis of reptiles even from distances up to 1m.
i tried it on myself, you def get tanned from this one by just sitting about 1m next to it for 20-30 min..
these reptile CFL bulbs are a waste of time and money, as their output in UV-B is way to low..it would effect reptiles only from short distances of maybe 20cm(so maybe ok for very small terrariums/animals). and plants, especially cannabis, can take even more UV-B than most animals.
http://www.uvguide.co.uk/lightingsurveyintro.htm
http://www.uromastyx-ocellata.de/?id=wissenswertes/uvbeleuchtung
Attachments
Last edited:
neverforget4/20
Member
Just 3w uvb on that bulb also all that heat would not be my friend.
Did you try it with any plants?
subrovka
Member
yes i´m using it 90mins per day and the heat is not an issue as the most heat is radiated from the backside and the socket of the lamp.
3W of UV-B is a lot if your plants obtain that radiation.
also, that declaration in percentage (or absolute in W) is not really valuable, one should compare the measured UV-B watts per area from the same distance.
with fluorescent tubes you need to go very close to the canopy, otherwise your plants don´t benefit from it.
you could bomb your space with fl-tubes or cfl´s so that you have 300W of UV-B by calculation, but this doesn´t matter to your plants if they don´t obtain that radiation.
ps. i´m using it mainly for my sativas, if you´re interested i have a malawi grow running https://www.icmag.com/ic/showthread.php?t=322760
greetings,
subrovka
3W of UV-B is a lot if your plants obtain that radiation.
also, that declaration in percentage (or absolute in W) is not really valuable, one should compare the measured UV-B watts per area from the same distance.
with fluorescent tubes you need to go very close to the canopy, otherwise your plants don´t benefit from it.
you could bomb your space with fl-tubes or cfl´s so that you have 300W of UV-B by calculation, but this doesn´t matter to your plants if they don´t obtain that radiation.
ps. i´m using it mainly for my sativas, if you´re interested i have a malawi grow running https://www.icmag.com/ic/showthread.php?t=322760
greetings,
subrovka
Last edited:
neverforget4/20
Member
yes i´m using it 90mins per day and the heat is not an issue as the most heat is radiated from the backside and the socket of the lamp.
3W of UV-B is a lot if your plants obtain that radiation.
also, that declaration in percentage (or absolute in W) is not really valuable, one should compare the measured UV-B watts per area from the same distance.
with fluorescent tubes you need to go very close to the canopy, otherwise your plants don´t benefit from it.
you could bomb your space with fl-tubes or cfl´s so that you have 300W of UV-B by calculation, but this doesn´t matter to your plants if they don´t obtain that radiation.
ps. i´m using it mainly for my sativas, if you´re interested i have a malawi grow running https://www.icmag.com/ic/showthread.php?t=322760
greetings,
subrovka
Ill check out your grow.
How can you determine the UVB exposure? I could not find any measurements at all on their 'data' page. I dont think stating 3w UVB tells us anything at all
Agromax states 170 mW cm(2) @ 2ft. for their 48" t5. I believe this is more than sufficient to trigger desired response in cannabis.
Also even if the heat is coming out the back it's still wasted energy (unless it is cold in your room).
300w bulb but much is wasted through IR.
Very interesting. A few comments, maybe of some value, maybe not. I myself have been using Behr ceiling paint since it is formulated to reflect visible light. Whether it reflects UV is unknown to me. Also, there was mention of the apparent "whiteness" of wall paint. Some wall paints contain ingredients (optical brighteners) that fluoresce when exposed to UV light, which gives the walls an apparent "whiteness and brightness" which isn't the result of reflected light, and is probably of no extra value for grow purposes.
neverforget4/20
Member
There are loads of peer reviewed uvb studies online. Ive used the posts of kite high on riu as a guide. He recommends 140-400 mW cm(2).
So far ive used the hortilux uvb and tge arcadia t5's. Both elicited responses from the canopy at 12-18" when energized for 4 hours per day. I havent used tge agromax enough to state its effectiveness.
Your results with the paint are impressive. What type of emitter will you use when you are good to go?
So far ive used the hortilux uvb and tge arcadia t5's. Both elicited responses from the canopy at 12-18" when energized for 4 hours per day. I havent used tge agromax enough to state its effectiveness.
Your results with the paint are impressive. What type of emitter will you use when you are good to go?
neverforget4/20
Member
Super interesting. I'll be looking forward to updates.
When I have some observations on that agromax bulb I'll let you know. Ive got a full figured beauty at week 3+. She's gonna get initiated as soon as buds form. She is currently full of flowers.
There is some well informed UVB discussion over on RIU if you are curious. A few gardeners swear by UVB but Ive not heard anyone mention reflective materials in relation to UVB.
When I have some observations on that agromax bulb I'll let you know. Ive got a full figured beauty at week 3+. She's gonna get initiated as soon as buds form. She is currently full of flowers.
There is some well informed UVB discussion over on RIU if you are curious. A few gardeners swear by UVB but Ive not heard anyone mention reflective materials in relation to UVB.
biggreg
Member
Lots of growers use metal halides, CMH, 10k bulbs whatever for the uv enhancement. I think we may be missing the boat if our walls absorb large percentages of it.
In smaller grows with UVB bulbs close to canopy, UV reflectivity may not be as big of a benefit but for Mh and CMH users ( and some led users with UVA diodes), why lose the UV light you've already paid for?
In smaller grows with UVB bulbs close to canopy, UV reflectivity may not be as big of a benefit but for Mh and CMH users ( and some led users with UVA diodes), why lose the UV light you've already paid for?
subrovka
Member
it´s a full spectrum lamp, so it puts out also IR but the heat from the backside is more convection than radiation (mix of both).
the bulb is very bright, so the plants don´t only benefit from the UV-B part of the spectrum.
..there´s a table in the attachment of my last post which states about 250 mW/cm^2 at 60cm (about 2ft) for the osram vitalux 300W.
this measurements wasn´t made by me, it´s from a german reptile-breeder´s page http://www.uromastyx-ocellata.de/?id.../uvbeleuchtung
there´s quite a lot of valuable information gathered about artificial lightning for animals (and so for plants). very interesting read but unfortunately all in german..
greetings,
subrovka
neverforget4/20
Member
Ya, looks like in a larger space, with more canopy spacing reflective surfaces would be very beneficial. In my flower room (26 x 54" aprox) any one of the bulbs i mentioned will over supply UVB if placed close to the canopy <10", I im more concerned with limiting the exposure intensity and duration to best advantage.
I keep my led panel 20-24" above canopy and I hang the UVB bulbs a few inches lower.
Since in nature, UVB isnt reflected much it follows that studies of outdoor uvb would be looking at canopy exposure only. I wonder if there is any research showing effects of exposing more or most of the plant to UVB?
Im really interested to see what effects you observe after coating the walls.
neverforget4/20
Member
good information. Thank you.
Have you seen obvious visible effects from the Osram bulb?
Im looking forward to testing out the agromax. I'll post some pics when i fully deploy it.
