Any negative effects from a grow light?

Copy of PM from Linkinpark08 below:


LinkinParkRulez08 Online
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LinkinParkRulez08 is on a distinguished road

Posts: 96
Join Date: Dec 2007
Location: Tampa, FL
Default UVB Lights - Today, 10:37 AM
http://en.wikipedia.org/wiki/Photosy...hemical_energy

It is part of Photosynthesis. It doesnt say UVB but it says light and UVA and UVB are usually the ones that are not absorbed that much.

Hope this helps with your research

1.0 Vield, 3.4 Bearded Dragons, 1.0 Chinese Water Dragons, 1.0 Mali Uromastyx
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Linkin..thanks for the PM...its copied at the top of this post.

So, now, your Wikipedia link suggests that UVB is not a major contributor to plant photosynthesis???? Is that a contradiction of the info you quoted from your academic text.

BTW, please quote that texts name and author.. Id still like to aquire it ....
 
cham_man said:
Copy of PM from Linkinpark08 below:


LinkinParkRulez08 Online
Junior Member
LinkinParkRulez08 is on a distinguished road

Posts: 96
Join Date: Dec 2007
Location: Tampa, FL
Default UVB Lights - Today, 10:37 AM
http://en.wikipedia.org/wiki/Photosy...hemical_energy

It is part of Photosynthesis. It doesnt say UVB but it says light and UVA and UVB are usually the ones that are not absorbed that much.

Hope this helps with your research

1.0 Vield, 3.4 Bearded Dragons, 1.0 Chinese Water Dragons, 1.0 Mali Uromastyx
Forward Message




Linkin..thanks for the PM...its copied at the top of this post.

So, now, your Wikipedia link suggests that UVB is not a major contributor to plant photosynthesis???? Is that a contradiction of the info you quoted from your academic text.

BTW, please quote that texts name and author.. Id still like to aquire it ....
Click to expand...



Natural sources of UV
The Sun emits ultraviolet radiation in the UVA, UVB, and UVC bands, but because of absorption in the atmosphere's ozone layer, 99% of the ultraviolet radiation that reaches the Earth's surface is UVA. (Some of the UVB and UVC radiation is responsible for the generation of the ozone layer.)

Ordinary glass is partially transparent to UVA but is opaque to shorter wavelengths while Silica or quartz glass, depending on quality, can be transparent even to vacuum UV wavelengths. Ordinary window glass passes about 90% of the light above 350 nm, but blocks over 90% of the light below 300 nm.[2][3][4]

The onset of vacuum UV, 200 nm, is defined by the fact that ordinary air is opaque below this wavelength. This opacity is due to the strong absorption of light of these wavelengths by oxygen in the air. Pure nitrogen (less than about 10 ppm oxygen) is transparent to wavelengths in the range of about 150–200 nm. This has wide practical significance now that semiconductor manufacturing processes are using wavelengths shorter than 200 nm. By working in oxygen-free gas, the equipment does not have to be built to withstand the pressure differences required to work in a vacuum. Some other scientific instruments, such as circular dichroism spectrometers, are also commonly nitrogen purged and operate in this spectral region.

Extreme UV is characterized by a transition in the physics of interaction with matter: wavelengths longer than about 30 nm interact mainly with the chemical valence electrons of matter, while wavelengths shorter than that interact mainly with inner shell electrons and nuclei. The long end of the EUV/XUV spectrum is set by a prominent He+ spectral line at 30.4nm. XUV is strongly absorbed by most known materials, but it is possible to synthesize multilayer optics that reflect up to about 50% of XUV radiation at normal incidence. This technology has been used to make telescopes for solar imaging; it was pioneered by the NIXT and MSSTA sounding rockets in the 1990s; (current examples are SOHO/EIT and TRACE) and for nanolithography (printing of traces and devices on microchips).


A positive effect of UVB exposure is that it induces the production of vitamin D in the skin. It has been estimated that tens of thousands of premature deaths occur in the United States annually from a range of cancers due to vitamin D deficiency.[5] Another effect of vitamin D deficiency is osteomalacia (the adult equivalent of rickets), which can result in bone pain, difficulty in weight bearing and sometimes fractures. Other studies show most people get adequate Vitamin D through food and incidental exposure.[6]

Many countries have fortified certain foods with Vitamin D to prevent deficiency. Eating fortified foods or taking a dietary supplement pill is usually preferred to UVB exposure, due to the increased risk of skin cancer from UV radiation.[6]

Ultraviolet radiation has other medical applications, in the treatment of skin conditions such as psoriasis and vitiligo. UVA radiation can be used in conjunction with psoralens (PUVA treatment). UVB radiation is rarely used in conjunction with psoralens. In cases of psoriasis and vitiligo, UV light with wavelength of 311 nm is most effective


It is also used for calcium and vitamin D3 absorbtion, above explains some of it. UVA is used in plants.... I might have mixed them up but I'm pretty sure that UVA is for plants and UVB is for Animals. Also, UVB has some parts in Plants
 
That's what I'm doing (just smiling) while I read about you all figuring out your plants don't need UVB light.
(2 pages after I posted it)

-Brad:)
 
Consider this:
Many of the plants we use in chameleon habitats are low level in the forest.
Meaning, they see very little if any sunlight.
Very filtered, very indirect light is what is required or they get burned ( by excessive UV rays)
An exception would be hibiscus, which needs lots of direct light ... an example is evidenced earlier in the thread. Although I don't believe that the light in that example ( being a UVB bulb) had much to do with the results.

-Brad
 
Brad Ramsey said:
Consider this:
Many of the plants we use in chameleon habitats are low level in the forest.
Meaning, they see very little if any sunlight.
Very filtered, very indirect light is what is required or they get burned ( by excessive UV rays)
An exception would be hibiscus, which needs lots of direct light ... an example is evidenced earlier in the thread. Although I don't believe that the light in that example ( being a UVB bulb) had much to do with the results.

-Brad
Click to expand...

True. I never even thought of that.
 
cham_man said:
Wow.. thats really fascinating that light rays can travel around.....

I thought that light travels in a straight line, unless some mass such as a planet and its gravity can bend it ever so slightly.

LinkinPark... please leave us the name of one of the books you have read linking UVB with plant requirements.

Oh and Linkin... looks like you are breaking the record with 59.39 average posts per day

https://www.chameleonforums.com/members/linkinparkrulez08/

thats truly amazing.
Click to expand...

LMAO....
I thought the same... only been away for a week and the "new kids" hit the block running....LOL
Show us the proof, OR it didn't happen...LOL
Cheers
Scott.:D
 
how come no one answered the question? I asked the same one.. he wants to know if it will hurt his cham..he didn"t need to know the fundamentals of uvb lighting..I asked the same thing and I was told you don"t need another light to manage.. but the light I just purchased is a ge plant light incandescent bulb 75w
it was 5 bucks and it throws off heat and a blue light..and the light looks close to the repti sun 5.0..wait don"t worry..it replaced my basking lamp not the repti sun.. now I have the repti sun 5.0 and the plant light and the temps are near perfect..it throws off just as much heat as the basking bulbs at 75w..I think for 5 dollars you cant beat a light that throws of heat and helps the plants at the same time...but more input on these lights would be great..but it seems no one
cares for them...
 
eldarado said:
how come no one answered the question? I asked the same one.. he wants to know if it will hurt his cham..he didn"t need to know the fundamentals of uvb lighting..I asked the same thing and I was told you don"t need another light to manage.. but the light I just purchased is a ge plant light incandescent bulb 75w
it was 5 bucks and it throws off heat and a blue light..and the light looks close to the repti sun 5.0..wait don"t worry..it replaced my basking lamp not the repti sun.. now I have the repti sun 5.0 and the plant light and the temps are near perfect..it throws off just as much heat as the basking bulbs at 75w..I think for 5 dollars you cant beat a light that throws of heat and helps the plants at the same time...but more input on these lights would be great..but it seems no one
cares for them...
Click to expand...

i think no one cares about them because it is not necessary to own.
I originally thought that plants need UVB to thrive in captivity, but studying this thread, I realize they need UVA a lot more.
I think Brad Ramsey told us that it's fine to use it in his first post.

My problem with Hibiscus leaves turning yellow and withered were fixed due to this thread's info.
I basically change my incandescent bulb to zoomed basking spot lamp (75 watt) and aim the light directly to my hibiscus.. and within few days flowers start to bloom and the leaves stop turning yellow. I might add the 40 Watt bulb to hopefully stimulate even more growth.

So, if you already own the UVA basking spot lamp, i say save your money for something else. If you already buy the growth lamp, as long as you are sure it's not emitting extra UVB or any weird light radiation, I say go for it.
 
i know sorry man.. the light is a ge plant light.. I got mine at target.. this thing gives off amazing color.. mine is a 65w flood.. my ambient temp is at 78.. for a young veiled its perfect.. he loves to bask under it.. it enhances the color of the repti glo 5.0. its probably like the reptile blue light from zoo med.. i was looking in to getting one of them.. but i tried this instead.. you should look into it though.. when i had the zoo med basking lamp 100 what it was 83 deg.. so I think it throws off more heat with lower wattage..
 
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