Uv Light

R

rarrar

Active Member
Please xcuse the low threads posted, I had to open a new acc

Ok so I have experimented with everything else nw. My next go is uv light. Is blck light the correct uv spectrum? or do I want the reptile t5-t8 bulbs? and what kind of times do I want to introduce it to the plants?? any info apperciatedkiss-ass
 
Stoney McFried

Stoney McFried

Well-Known Member
I know that black light is not the right spectrum.Reptile lights are probably the way to go, but I've also heard that metal halide emits the right wavelengths of uvb as well.This video is long, but it explains about the effects of uvb on cannabis.http://www.youtube.com/watch?v=IPcpt3Be28o
rarrar said:
Please xcuse the low threads posted, I had to open a new acc

Ok so I have experimented with everything else nw. My next go is uv light. Is blck light the correct uv spectrum? or do I want the reptile t5-t8 bulbs? and what kind of times do I want to introduce it to the plants?? any info apperciatedkiss-ass
Click to expand...
 
onenumcat

onenumcat

Well-Known Member
'black light' only produces UVA. UVB is what you need. UVB also reduces odors. reptile light is the best. there are several manufacturers making several different UVB quality lamps, 2%, 5%, and 10%. they come in compact (like coils or loops) and full size (tubular). these are only effective during the flower stage, to increase trichrome production of THC.

be careful with those light, they'll give you a sunburn, harm your eyes, and, possibly, cause melanoma, skin cancer.
 
SayWord

SayWord

Well-Known Member
and have it on during the middle 5-6 hours of ur light cycle. you may want to start out with less and gradually increase so u dont stress the ladies
 
Stoney McFried

Stoney McFried

Well-Known Member
http://en.wikipedia.org/wiki/Metal_halide_lamp



[FONT=Arial, Verdana, sans-serif]. REPRESENTATIVE LIGHT SOURCES AND THEIR PRINCIPAL TYPES OF RADIATION
Note: Wavelengths responsible for conversion of 7-dehydrocholesterol to cholecalciferol: 280-315nm[/FONT]
[FONT=Arial,Helvetica,Verdana]SOURCE[/FONT]​
[FONT=Arial,Helvetica,Verdana]RADIATION[/FONT]​
[FONT=Arial, Verdana, sans-serif]Sun[/FONT]​
[FONT=Arial, Verdana, sans-serif]UVB 290-320 nm, UVA 320-400 NM, Visible 400-700 NM, Infrared >700 NM[/FONT]​
[FONT=Arial, Verdana, sans-serif]Incandescents (frosted, reflector floods, spots, halogen lamps[/FONT]​
[FONT=Arial, Verdana, sans-serif]UVA 320-400 NM (low levels), Visible 400-700 NM, Infrared >700 NM[/FONT]​
[FONT=Arial, Verdana, sans-serif]Fluorescents:[/FONT]​
[FONT=Arial, Verdana, sans-serif]Chroma 50, Colortone 50, Design50, Cool White, Warm White[/FONT]​
[FONT=Arial, Verdana, sans-serif]Visible 400-700 NM
UVB 280-320 NM (low levels), UVA 320-400 NM (low levels)[/FONT]​
[FONT=Arial, Verdana, sans-serif]Plant lights[/FONT]​
[FONT=Arial, Verdana, sans-serif]Emphasize red and blue spectrums within Visible 400-700 NM[/FONT]​
[FONT=Arial, Verdana, sans-serif]Blacklights (BL)[/FONT]​
[FONT=Arial, Verdana, sans-serif]UVB 290-320 NM (low levels similar to Vita-Lite), UVA 320-400 NM[/FONT]​
[FONT=Arial, Verdana, sans-serif]Blacklight Blue (BLB)[/FONT]​
[FONT=Arial, Verdana, sans-serif]Same as BL but with less blue light emitted; reported harmful to eyes[/FONT]​
[FONT=Arial, Verdana, sans-serif]Sun lamps, Germicidal Lamps, Phototherapy lamps[/FONT]​
[FONT=Arial, Verdana, sans-serif]High levels of UVB causes skin cancer, cataracts, etc.[/FONT]​
[FONT=Arial, Verdana, sans-serif]Other UV Sources:[/FONT]
[FONT=Arial, Verdana, sans-serif]High Intensity Discharge Mercury, Metal Halide[/FONT]​
[FONT=Arial, Verdana, sans-serif]Visible 400-700 NM, Infrared >700 NM; UVA and UVB are shielded due to extensive damage to skin and eyes caused by such high intensity[/FONT]​
[FONT=Arial, Verdana, sans-serif]Mercury vapor combo heat/UV product[/FONT]
[FONT=Arial, Verdana, sans-serif]Extremely high output of UVA and UVB posing health hazards to humans and reptiles in typical home setting[/FONT]
​
​
 
growwwww

growwwww

Well-Known Member
onenumcat said:
well, most HID's lights produce UVA/B, but are coated to prevent their escape from the bulb...
Click to expand...
These are the ones that are used for growing in mind. But if u buy ones for security lights or whatever they usually have a perspex or glass sheet infront which filters out the harmfull rays. Take that offf and u should be gettign bigger abd nicer buds. I believe thats what the glass is for to reduce UV rays.
 
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