True enough for the space parameter as it can be controlled separately from the light source, not for all (like the one missing from the graph I'm sure you are familiar with too). But yeah in theory one has just as much control over modifying the space paramater with hid and led, as of course both can be ran hard or soft.Sure there are other parameters, but if you adjust for one light you adjust for the other. Modify the parameters and the results may be slightly higher or lower, but that has nothing to do with an advantage for a particular light source.
The test was a little ridiculous; with nothing in front of 2700W of COB LED, everyone was squinting- through sunglasses. It was plain uncomfortable to be anywhere near it without shades on. Easily twice the light pressure of the 860W CDM Allstart lamps I'm replacing, they were also running and so (subjective) comparisons were easy.alright alright ill stop drinking and start tapping....
ill bet... when you got that special feeling... were glances shared? or did you look a the ground shamefully?The test was a little ridiculous; with nothing in front of 2700W of COB LED, everyone was squinting- through sunglasses. It was plain uncomfortable to be anywhere near it
Too busy celebrating! This is by far the biggest and most complex piece of electronic equipment I've ever designed and built. I'm just glad it works as I envisioned it!ill bet... when you got that special feeling... were glances shared? or did you look a the ground shamefully?
Orrrr just place a MH between your HID lights....its so blue andddd actually produces UV light unlike COBs.
are the bulbs not also made out of glass?Let's not forget no air cooled reflectors or you nullify the UV. Not arguing with your observations or ideas just hoping no one hoping for uv uses glass......
Here's the huge amount you ripped off....which have arguments both for and against UV-B and THC, but not necessarily overall terpene/terpenoid profiles....With emphasis on 'basic'. And in a fictional situation where nothing else than par/w eff of the light source matters. For a more realistic comparisson however it's not that simple and more to it then running cobs soft to reduce power usage and increase par/w efficiency.
@Abiqua, open your mouth:
"Light affects the characteristics of plant growth and development at virtually every stage of the plant life cycle and influences both morphogenic features and intracellular metabolism. In many cases, the physiological responses triggered by photoperception are mediated by changes in gene expression and are accomplished by the coordinate activation or suppression of specific batteries of light-regulated genes (Tobin and Silverthorne, 1985;Gilmartin et al., 1990).
Light has been shown to activate the expression of gene families that encode proteins involved in photosynthesis, nitrogen metabolism, and flavonoid biosynthesis. [mere examples] "
Read:
https://books.google.nl/books?id=q2bvAgAAQBAJ&pg=PA669&lpg=PA669
E.g. "Light quality is an important factor for essential oil production."
"However, isoprenoid production is induced by UV radiation, but not always supplementary UV-B leads to increased isoprenoid production (Dolzhenko et al. 2010). Maffei and Scannerini (2000) reported ..."
Read about isoprenoid, mep pathway (from which cannabinoids are derived as well), combine with keywords like oils, or specific terpenes.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4740396/
Cannabis Sativa, plant of thousand and one molecules
And not just terpenes as has been known for a while... see:
EFFECT OF LIGHT QUALITY ON CANNABINOID CONTENT OF CANNABIS SATIVA L. (CANNABACEAE)
Or:
"Various studies have indicated the positive effect of cytokinin on terpene production." cytokinin "regulates gene expression". "Cytokinin takes part in light response modulation and affects the circadian rhythm regulation and phytochrome functions (Chen et al. 2006, Naito et al. 2007, Yakir et al. 2007)."
"Environmental conditions can influence essential oil biosynthesis, since it may alter hormonal balance. Thus, phytohormones may act as signals that can, directly or indirectly, induce secondary metabolites biosynthesis (Prins et al. 2010). Light availability and quality can be positively associated with essential oil production, as observed with Cymbopogon flexuosus, which showed an increase of approximately 30% in essential oil biosynthesis when plants were treated with red light (Sangwan et al. 2001). "
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2197-00252013000200008
"UV-B modulates the interplay between terpenoids and flavonoidsin peppermint"
Modulation of secondary metabolites by UV-B involves changes in gene expression.
http://www.academia.edu/1175424/UV-B_modulates_the_interplay_between_terpenoids_and_flavonoids_in_peppermint_Mentha_x_piperita_L._
Just examples of the huge amount of research available that shows how much the expression of the relevant genes are affected by the "quantity and quality" (that was a quote already...) of light. There is a lot more fruitful potential there than just beating hps in terms of par watt efficiency.
Yes, glass will filter most uv b, not uva very effectively though== regulations require it(envelop),so not to harm people working under them......cmh included, was originally meant for retrofitting hps/better light quality( Philips retrowhite)are the bulbs not also made out of glass?
the CMHs even say the outer glass of the bulb filters out UV
There's actually two envelopes on the t12 , the t9 is unprotected. Philips already has the two documented , the uv of course is less in the t12. The glass used in t5 tubes allows more uv through.i have one of those cheapo 'uv indicator cards' from the eye hortilux 'powerveg T5' display at my store. ill run it under cmh and hps and comapre that to powerveg and reptisun tubes
Wow... Well, frankly, I should not surprised that thick plate of bias in front of your eyes prevents you from seeing the obvious reality, and by now your desire to remain ignorant should not amaze me either but wow man... Are you daft?Here's the huge amount you ripped off....which have arguments both for and against UV-B and THC, but not necessarily overall terpene/terpenoid profiles....
A link to a thread where Sam gathers research... Show me where he agrees with your statement and disagrees with mine... With hyperboles this time bullshitter... indicating verbatim quotes (the irony...). There's obviously a huge lack of knowledge in your peanut brain that makes it hard for you to comprehend I already proved your wrong with my very first reply. PM just that to Sam, be sure to add it's from me, if you really want to see and prove if he agrees with your ignorance.Sam is of the same opinion as me,
https://www.icmag.com/ic/showthread.php?t=304840
eye hortilux card:i have one of those cheapo 'uv indicator cards' from the eye hortilux 'powerveg T5' display at my store. ill run it under cmh and hps and comapre that to powerveg and reptisun tubes
eye hortilux card:
30" under ushio DE HPS in an air-cooled AC/DE w/glass = no UVB, maybe a tiny bit on the low scale
6" under regular 48" t5 6500k = low
12" under 18" 15W reptisun 10.0 bulb = low
6" under (2)powerveg t5s in a fixture with 2 regular t5s = moderate
18" under "open" rated (aka double jacketed) philips 930 315 CMH = moderate
It's stupid to compare the lumen output between HPS and Cree led cobs since HPS has a higher LER and would have a much higher lumen output if both lighting devices were 100% efficient.100% Original BC BLONDES 900 WATT LED PANEL
Phillips DE: 143,000 Lumens. So you save roughly 150w, get 1k lumens less, for $1000 more. Obviously with the DE there are reflector losses, and the lumens alone doesn't say everything, but it doesn't change the fact they do what many led fans and shills have done here, compare their best led to older hps. Fanboy behavior 101.
- 26% more lumens then 1000w HPS
- Draws 900+ Watts from the wall
- 142,000 Lumens
A simple 600w has an ouput of 90k, more than the $800 setup bobby mentioned, at merely a quarter/fifth of the cost.
I know it's hard to admit the theoretic efficiency numbers are not as meaningful in practice as led fans claims, as it would crumble the very foundation your religion is founded on.