Trichomes, THC and UVB light.....

natmoon

natmoon

Well-Known Member
skunkushybrid said:
Yes... high in UV A... and relatively high in UV B too.

I like it... fook it, i'm gonna order it right now.
Click to expand...
Well i had heard that many of the lamps available had a great uva output but emitted hardly any uvb.
Where did you find the specs for the lamp that your going to order?
I couldn't find the specs anywhere for it.
Anyway best of luck whatever you do.
Heres a link to a proper high output uvb lamp that works well and emits a low amount of uva and a high amount of uvb:blsmoke:
Southwest Exotics, 100W UVB Flood lamps
 
skunkushybrid

skunkushybrid

New Member
I just ordered and payed for the other one... had to buy a holder for it too. Should have them in the next couple of days.

I got the spec's from a different site that linked me to that page, apparently this bulb is supposed to be the closest you can get to the sun's radiation.

I'll look into your bulb too, might be worth buying as well.
 
natmoon

natmoon

Well-Known Member
skunkushybrid said:
I just ordered and payed for the other one... had to buy a holder for it too. Should have them in the next couple of days.

I got the spec's from a different site that linked me to that page, apparently this bulb is supposed to be the closest you can get to the sun's radiation.

I'll look into your bulb too, might be worth buying as well.
Click to expand...
The bulb your getting sounds good and has a high wattage to.
If the bulb you've ordered works well and like you said has a near sunlike output then its a great buy.
How much was the units fitting?:blsmoke:
 
skunkushybrid

skunkushybrid

New Member
Here's the bill:

Item
Qty
Description
Rate
Amount
VAT
Gross Amount
Lampholder E27 Porcelain ES1Lampholder Porcelain ES E27£5.65£5.65£0.99£6.64UV300 Ultravitalux 300W ES Osram1Ultra Vitalux Mercury Tungsten Blended UV Reflector Self Ballasted 300 Watt 240 Volt ES E27 Cap Osram£40.25£40.25£7.04£47.29VAT£8.03 Total£53.93
 
natmoon

natmoon

Well-Known Member
skunkushybrid said:
Well that didn't turn out right.

Total price is £53.93

47.29 for the light

6.64 for the holder.
Click to expand...
Well a bit pricey but if it works well it will be worth it.
Personally i reckon you'll see more trics being put out and more resin as well and it will turn out to be an investment.

How far away do you plan to have the lamp from the plants and what cycle are you going to use?

I had planned to buy a 5 foot tanning tube but if this works out for you i may well give it a go instead as i like the idea of having a spot lamp better than a tube.
Are you going to make a reflector for it?:blsmoke:
 
psyclone

psyclone

Well-Known Member
can't get out of my head the thought that Moonlight is missing from my plants schedule- 6 weeks of moonlit nights in fact, and I am sure I read somewhere that moonlight is(quite) high in UV. My local Aquarium shop sells an actinic moon light simulator, it's peak emission is 300nm. yes I bought it. it covers 1m2 with ambient moonlight, so a couple of hours a night 1 week a month will be tried on some cuttings that are in 12/12.
 
skunkushybrid

skunkushybrid

New Member
psyclone said:
can't get out of my head the thought that Moonlight is missing from my plants schedule- 6 weeks of moonlit nights in fact, and I am sure I read somewhere that moonlight is(quite) high in UV. My local Aquarium shop sells an actinic moon light simulator, it's peak emission is 300nm. yes I bought it. it covers 1m2 with ambient moonlight, so a couple of hours a night 1 week a month will be tried on some cuttings that are in 12/12.
Click to expand...
You're ahead of the game... cannot wait to see how this one turns out.:mrgreen::peace:
 
tahoe58

tahoe58

Well-Known Member
the moonlight thing sounds interesting....I too will be interested in this...ahhhh the complexity of nature and all its cogs and components.....makes me think like we could prolly model our climate really accurately! oh right....they're already doing that!

on a different note, I found this thread, and am currently reading it....will post more again later tonight...

UVB light and its effect on THC prodcution - UKCultivator

TAKEN FROM THAT THRED.......some fella on ukc( was it greenman ?) told of his experience with a 300watt osram uvb bulb, 3 sessions of 25mins a day and he had billions of more trichs than without uvb,, uhmm i looked around for the light , found it , but it was a little pricey, and 300watts.

Sharma (1975) reported a greater glandular trichome density on leaves of Cannabis growing in xeric circumstances. Paris et al. (1975a) have demonstrated a marked increase in the cannabinoid content of Cannabis pollen with decreased humidity. Murari et al. (1983) grew a range of Cannabis fiber cultivars in three climatic zones of Italy and found higher THC levels in those plants grown in the drier "continental" (versus "maritime") climate. Hakim et al. (1986) report that CBD-rich English Cannabis devoid of THC produced significant amounts of THC and less CBD, when grown in the Sudan. This trend was accentuated in their next generation of plants.
 
tahoe58

tahoe58

Well-Known Member
ok...well continuing my search for a better understanding of what we might be shooting for in terms of UVB delivery and intensity. I have found the following: natural sunlight UVB delivery at the Equator is 265 microwatts/cm2. this can be favourably compared to several different UVB lights on the market including T-Rex Active UVHeat (UVB and heat), MegaRay mercury vapor (UVB only), ZooMeds Powersun UVHeat (UVB, UVA and heat), and some others....fluorescents generally produce very little UVB but also UVA (and generally at a rate double their UVB).

UV radiation represents only 4.6% of the solar spectrum, the other component being visible (45%) and infrared light (50%).

The irradiation is the radiation energy incident over a specific area for a given period of time. It is expressed either in W*s /m2, Joule/m2 or very often in Langley (Ly).


1 Ly = 1 cal/cm2 = 4.184 E4 Joule/m2​




The following are some example of irradition val;ues for various notable marijuana producing countries: Pakistan and Afganhistan (180); Nepal, Jamaica, South Africa, Mexico and Morocco (160); Thailand (140) as compared to Canada (100) and the UK (70). The highest values (in the table I looked at....Sudan (220) and Bahrain, Egypt, Mali, Saudi Arabia, Niger (200) - all, in my view either too dry or too wet?​

it only math....but I'm not into trying to figure out what will work best right now. the 160W T-Rex Active UVHeat have the appropriate measure of microwatt/cm2....250-300 @ 18-24"​

I looked for your bulb Skunk.....Osram 300W Flood.....but it is not in the chart that I found? I'm gonna keep looking to see what else I can figure out here.....​
 
tahoe58

tahoe58

Well-Known Member
some more background info coming ur way....

Sunlight in tropical and sub-tropical regions has UVB levels typically rising to 300-400 uW/cm² (with a UV Index of about 7 - 10) by mid-day. On a clear day, levels may rise to above 100 uW/cm² (UV Index 1.5 - 2) within two hours of sunrise. Even in the shade or under overcast skies, 100 uW/cm² or more may be recorded throughout the middle of the day. (1, 2)

Until relatively recently, few artificial sources provided anything but very low intensity UVB at short range.(7) Specialist fluorescent tubes marketed for reptiles, described as 5% or 8% UVB, for example, when new typically emit only 15 – 25 uW/cm² at 12 inches.(8)

I have also found the following meter for measuring UVB from Welcome to Solartech

SOLARMETER


MODEL 6.0 UV METER UVB
​



[FONT=Arial,Helvetica,Geneva,Swiss,SunSans-Regular][SIZE=-1]
[/SIZE][/FONT]
[SIZE=-1][FONT=Arial,Helvetica,Geneva,Swiss,SunSans-Regular]
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​

Features
  • Integral Sensor
  • Compact
  • Durable
  • Accurate
  • LCD readout
Applications

  • Lamp UVB Intensity & Aging
  • Acrylic Shield Transmission
  • Percent (%) UVB if divided by reading from
    Model 5.0 (UVA + B)
  • Eyewear UV block comparison
Solarmeter Specifications


RadiometerModel6.0Irrad. Range0-19.99 mW/cm² UVBResponse280-320 nmResolution0.01 mW/cm²Conv. Rate3.0 Readings/SecDisplay3.5 Digit LCDDigit Size0.4 inch highOper. Temp 32° F TO 100° FOper. Humid.5% TO 80% RHAccuracy±10% REF.NISTDimensions (in.)4.2L x 2.4W x 0.9D (in.)Weight4.5 OZ. (incl. batt.)Power Source9-Volt DC BatteryLensUV GlassDiffuserVirgin Teflon .005
​




Click graph for enlarged view​




Sensor
Silicon Carbide (SIC) Photodiode packaged in hermetically sealed UV glass window cap.​

Interference filter coating (Metal Oxide) blocks most UVA from response as shown on Spectral Sensitivity Graph.​

Operation
Press and hold push-button switch on face of unit. Aim sensor window in top panel of meter directly at UV source. Note reading on LCD and record if desired.​

Battery operation voltage is 9V down to 6.5V. Below 6.5V the LCD numbers will begin to dim, indicating the need for battery replacement. Under "typical" service load, the battery should last about 2 years.​


Proper Usage of Solarmeter ® Ultraviolet Radiometer for Lamp Aging Tests
  • Wear eye protection when checking UV lamps (UV-block wrap around glasses).
  • Allow lamps to warm-up prior to taking readings (at least 5 min).
  • When checking aging of lamps, keep measuring distance and locations constant.
    Note: Model 5.0 (UVA + B) is best for lamp aging tests.
  • Lamps should be replaced when output drops 30% to about 70% of their original (new) readings. Take overall reading center of tanning bed bench pointing up with canopy closed, or check individual lamps at acrylic with canopy up. Keep track of hours vs. readings on a chart.
  • If unsure of what original new values were, replace two adjacent lamps with new ones of the same kind and compare to old ones.
  • To determine percent UVB divide Model 6.0 reading by Model 5.0 total UV (UVA + B) reading. (See FAQ page).
  • When checking acrylic transmission, take reading through acrylic; then remove acrylic and hold meter sensor at approximately the same distance from lamp as the acrylic shield was located. If acrylic blocks much UVB it should be replaced.
  • When using this meter to compare different type lamps, due to their different spectral power distributions, the readings should be considered relative rather than absolute. Although higher output lamps of similar SPD's will generally read higher than lower output lamps, ones that peak near 290-300 nm (as does the meter response) will read higher than ones peaking near 313 nm even if the total UVB output of both is the same.
  • Do not subject the meter to extremes in temperature, humidity, shock or dust.
  • Use a dry, soft cloth to clean the intrument. Keep sensor free of oil, dirt, etc.
Types of MV Lights- All in one UVB and Heat (Floods expand UVB under and outward/Spots concentrate directly underneath them).
  • Powersun UV made by Zoo Med (Shown in use in Figure 3) This is the easier to find UVB MV light on the market, some pet stores carry them and they are usually available at Expos/shows. They have excellent customer service should you experience early burn out. They are available in 100 watt and 160 watt Flood designs. We used the Flood for most of our enclosures. This is the least expensive of the UVB MV lights.
    Powersun UV 100 watt at ReptileSupply.com
    Powersun UV 160 watt at ReptileSupply.com
  • Active UV Heat by T-Rex This light has a stronger UVB output than the Powersun, cost a bit more, but in our opinion, worth it. Harder to find locally, it is available online many places and you can click on the links below to order. Available in 100 watt and 160 watts, Flood and Spot models. Customer Service is good, not as liberal with replacement cost as the Powersun.
    T-Rex Active UV Heat Flood - 100 watt at ReptileSupply.com
    T-Rex Active UV Heat Spot - 100 watt at ReptileSupply.com
  • Active UVHeat from Wild Inside This company has like the T-Rex Lights, but customer service has never been good for us. They do have a external ballast 60 watt light that is not available from T-Rex or Zoo-Med for smaller enclosures.
    Product Photo not available
  • Mega-Ray (Figure 4) from ReptileUV by Mac Industries/Westron Lighting This company has put it all together for us, avid owners of reptiles themselves, they sought out the best, improved on it, produced companion items and all with the *best* customer service of any company. They have Self Ballast lights available in 100 watt/160 watt Flood and the External Ballast in Low, Flood and Zoo quality. Additionally they have produced what we think is the best and safest Heat Emitter around. This new design uses less wattage to produce the required heat and with the added feature of protection so the animals are safe. The owner is available for consultation of your requirements for heat or UVB, by email or phone and actually prefers you contact him and start out with the proper lights.
 
L

LoveIt

Well-Known Member
psyclone said:
can't get out of my head the thought that Moonlight is missing from my plants schedule- 6 weeks of moonlit nights in fact, and I am sure I read somewhere that moonlight is(quite) high in UV. My local Aquarium shop sells an actinic moon light simulator, it's peak emission is 300nm. yes I bought it. it covers 1m2 with ambient moonlight, so a couple of hours a night 1 week a month will be tried on some cuttings that are in 12/12.
Click to expand...
i thought i read earlier in this 18 page thread (all of which i just read without blinking, whew... this has been a riveting discussion and i've been dying to learn more about this subject!) or maybe in an offshoot reference that someone cited, that moonlight doesn't reflect any significant radiation whatsoever... it is useful to scientists who want to measure how much and which spectra of light the earth reflects; that includes uvb. shit... let's grow some weed on the moon under some earthshine :mrgreen:

ps tahoe- glad you figured out my avatar lol
 
psyclone

psyclone

Well-Known Member
I read the same thread about the moons albedo. I also read in an article from Woomera space facility SpringerLink Home - Main that there is in fact a good deal of UV given off by the Lunar disc. also followed the UKcultivator link. V. interesting- someone on that sight is using a blue moon reptile light (same as the one I have bought) so reports shouldn't be long coming - just have to wait and see. Once a plant is in full flower outdoors, moonlight certainly doesn't seem to inhibit the flowering process, so not too much to lose I fancy. Oh yes, love the new toy Tahoe - I shall soon have more tech running a 4'x4' tent than sent Apollo to the Moon if not V. careful.......
 
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