10.0 Uvb Light

Jerry Garcia

Jerry Garcia

Well-Known Member
born2killspam said:
As for the dosages, don't decide until you see your results.. eza82 would obviously be able to cut back instantly if he noticed 8hrs UV was torching his plants, but you might be selling the potential a bit short Jerry.. My assumption is that if there is a perfect median unterval between those extremes, it would be stumled upon quicker by starting with longer periods and cutting them back as needed rather than slowly increasing the period as they allow..
Click to expand...
Great advice, and I agree 100%. My babies are still babies though, and I want to be careful with the amount of everything I give them, including UVB.

I'll give an update, and maybe some pics...been thinking about starting a journal...

Thanks too eza82--you've certainly done your homework!:clap:
 
Hobbes

Hobbes

Well-Known Member
Nice find eza.

"The UV pounding seems to stimulate all the resin glands, not just the ones directly being radiated."

This is what I've been finding too, the UVB seems to act as a catalast on buds that are not directly illuminated.

.

bongsmilie
 
D

DaGambler

Well-Known Member
hmmm... it'll be a month, but i'll try a couple of the 26w cfl's on one side of the garden for comparison. if it seems to help, then i'll get more.
.
 
Hobbes

Hobbes

Well-Known Member
I've been harvesting down 4 plants (Strawberry Cough, Skunkberry, Northern Berry, Northern Lights) and have 2 at at time under my 160W MV and 2 x 30W of floro tubes next to them. The plants are over their harvest date and not ripe, so I've been soaking them with UVB for 3 x 12 hour light cycles then putting them in a dark room for 60 hours. Then switching out for the other two.

Tons of new trich growth and the older trichs are starting to amber up. I'll check the trichs with a scope tonight and update.

.

bongsmilie
 
DrDank

DrDank

Well-Known Member
Hobbes said:
Nice find eza.

"The UV pounding seems to stimulate all the resin glands, not just the ones directly being radiated."

This is what I've been finding too, the UVB seems to act as a catalast on buds that are not directly illuminated.
Click to expand...
You probably don't need the UV bulb to even be close to any plants. A wide spread of UV over an enclosed area would affect all the plants, no?
 
P

peach

Well-Known Member
Shit this thread has a lot of post! :D I went away for a while to come back and find a ton more, have to spend a while reading back.
 
Hobbes

Hobbes

Well-Known Member
"You probably don't need the UV bulb to even be close to any plants. A wide spread of UV over an enclosed area would affect all the plants, no?"


I was thinking that too, the UVB rays shouldn't be absorbed by the air or dissipate with an extra foot or two of air space to the plant. If our reflective material on the walls don't absorb much UVB most of it should hit the plants.

We still have to get enough UVB though, without buying a dozen reptile flood lamps. We need a UVB lamp designed for growing, not for warming lizards.

.

bongsmilie
 
_secret

_secret

Well-Known Member
Hobbes said:
We still have to get enough UVB though, without buying a dozen reptile flood lamps. We need a UVB lamp designed for growing, not for warming lizards.

.

bongsmilie
Click to expand...
UVB lights aren't designed or intended for warming lizards, thats what heat lamps are for. UVB lights are designed to provide UVB for the reptile so it can synthesise vitamin D.
 
_secret

_secret

Well-Known Member
On another note, i purchased a ZooMed Reptisun 10.0 26W CFL and i've been suplementing my plants 8 - 10 hours a day with the UVB. Its been about a week now and although i havn't noticed a night and day difference, i do believe the lights have made a difference. I have no way of proving that its because of the UVB lights, but ive grow this particular strain a few times now with the same lights same conditions except for the UVB. This is by far the most densily covered plant ive had, trichs are HUGE. Im about 4 weeks in, and will post pictures of the final product when they are fnished.
 
Hobbes

Hobbes

Well-Known Member
"UVB lights aren't designed or intended for warming lizards, thats what heat lamps are for. UVB lights are designed to provide UVB for the reptile so it can synthesise vitamin D."

Do you have a link to a low-heat UVB lamp, or could you recommend a brand? All reptile UVB lights I've been able to find are combined (heat + UVB: Mercury Vapor for the one I bought), or the very weak UVB floro tubes (I've got 3 for side lighting). The only pure UVB lamps I've found have been for sterilizng a small area at close distance.

thanks

.

bongsmilie
 
_secret

_secret

Well-Known Member
Hobbes said:
"UVB lights aren't designed or intended for warming lizards, thats what heat lamps are for. UVB lights are designed to provide UVB for the reptile so it can synthesise vitamin D."

Do you have a link to a low-heat UVB lamp, or could you recommend a brand? All reptile UVB lights I've been able to find are combined (heat + UVB: Mercury Vapor for the one I bought), or the very weak UVB floro tubes (I've got 3 for side lighting). The only pure UVB lamps I've found have been for sterilizng a small area at close distance.

thanks

.

bongsmilie
Click to expand...

For me its a little bit easier since im doing more of a stealth grow, but im using a couple reptisun UVB CFLS .. 26W's and i have them in aluminum reflector hoods. I read an article that did some tests with the aluminum domes and they are supposed to boost UVB intensity 6x @ a 10 inch distance
 
Hobbes

Hobbes

Well-Known Member
"boost UVB intensity 6x @ a 10 inch distance"

That's interesting. Do you know if they mean 6X what a normal grow light would put out? I can't see it being 6X outdoors, but 6X in the grow room is impressive.

I've found the UVB flood/heat lamp at 24" makes the Blueberry fan leaves thick and hard, scruffy. There's verry little extra heat on the plants at 24" (back of hand test, around the grow room). I'll see if the UVB flood does the same to Strawberry Cough and Kush.

The 3 x 30W CFLs seem to be helping 2 other plants mature quicker, develop more THC hopefully. I've got them on two side walls, a few inches below the tops of the colas and the fixtures turned so the reflected light hits the sides of the plants. I've got 2 Bugglegum at about 3 weeks of flower, one beside the 30W UVB. The UVB hasn't been hurting it and I'll check tonight to see if the new buds are any bigger around the level of the light than on the Bubblegum not next to the light.

Fun stuff.

.

bongsmilie
 
_secret

_secret

Well-Known Member
No, they mean 6x the output of the light WITHOUT the reflector.

Here:
[FONT=Verdana, Arial, Helvetica, sans-serif]
However, aluminium surfacesappear to be very efficient reflectors of UV light. Compact fluorescent lamps have a comparatively large surface area. When most of the light from all sides of such a lamp is gathered and reflected downwards, as it is in a dome reflector, the resulting beam may be extremely intense. In our trial, at all distances between 6" and 22", the output was more than six times greater beneath the lamp once either the polished aluminium or brushed aluminium reflector was fitted.
Click to expand...
[/FONT]



i got this all from http://www.uvguide.co.uk/compactlamps.htm
 
You must log in or register to reply here.
Top