overTHEman
Active Member
aoyanagi! You're awesome!
This community will greatly benefit from your contribution.
LED Without LEDs -My First T5 Grow
- Thread starter pr0fesseur
- Start date
This community will greatly benefit from your contribution.
BlueB
Active Member
Here's a little teaser while we wait for the results for the Fiji Purple
His latest addition Fiji Purple was again a true innovation from Korallen-zucht
that has up to 6% red spectrum to mimic the natural sunlight & agitate color pigments
,for outstandingly amazing coral color & growth.
Here is the link, the paragraph is about half way into the article.
http://www.premiumaquatics.com/proline/T5promo.pdf
With only 6% Red, I don't think this would be a very good stand alone light. In another article it says these bulbs consist mainly of light under the 400nm range.
If I had to guess, the Fiji Purple is a 6500K daylight mixed with an Actinic. It will sure be interesting to find out where the red 6% peak.
My guess is the graph will be something like.......
His latest addition Fiji Purple was again a true innovation from Korallen-zucht
that has up to 6% red spectrum to mimic the natural sunlight & agitate color pigments
,for outstandingly amazing coral color & growth.
Here is the link, the paragraph is about half way into the article.
http://www.premiumaquatics.com/proline/T5promo.pdf
With only 6% Red, I don't think this would be a very good stand alone light. In another article it says these bulbs consist mainly of light under the 400nm range.
If I had to guess, the Fiji Purple is a 6500K daylight mixed with an Actinic. It will sure be interesting to find out where the red 6% peak.
My guess is the graph will be something like.......
BlueB
Active Member
Check this out.
I took a photo of a white wall with the light from my Spectra 100s LeD bouncing off of it.
I took another photo of the same wall with the light from the mixture of T5 lights I just got in the mail today.
I then cropped the photos down to just a small area on the wall to show the difference in color. It's almost the same.
Spectra 100s color:
Color from my T5 mixture:
I took a photo of a white wall with the light from my Spectra 100s LeD bouncing off of it.
I took another photo of the same wall with the light from the mixture of T5 lights I just got in the mail today.
I then cropped the photos down to just a small area on the wall to show the difference in color. It's almost the same.
Spectra 100s color:
Color from my T5 mixture:
TheHeathen
Member
Your picture there reminds me of an idea I had the other night when I first discovered this thread. I wonder if, theoretically, you could use a lcd display as a grow light. Program it to cycle through a sequence of colors mimicking par values. Just an idea.
BlueB
Active Member
That for sure is a unique idea.
UnderCurrentDWC
Active Member
TheHeathen
Member
I think it could be worth a look. LCD's either use cfl's or led's as backlighting, with the led backlit displays topping out somewhere in the 175 watt range. A 40" LED/LCD could be had from walmart(I don't condone shopping there, just for the sake of argument.) for right around $350 plus tax. No bulbs to buy. I just don't know about the UV spectrum. Seems to me that it wouldn't be able to emulate it, which, from my meager understanding about light waves and how LCD's work, thats all it would be able to do with any color. Still, an interesting idea, I think.
TheHeathen
Member
So, the idea has already been pondered here?
TheHeathen
Member
I don't think it would be any more expensive than buying a quality fixture and subsequent bulbs. Not saying it would work...
reactiv8ion
Active Member
I would like to use an 18" fixture as opposed to a 24" fixture due to space contraints. Not much bulb selection for the 18". Would it be ok to run 2x 454 and 2x Red Sun, in a blue/red/red/blue setup?
ahhh, this makes more sense, bummer though!
Undercover Cop
Active Member
You must spread some Reputation around before giving it to aoyanagi again!
pr0fesseur
Well-Known Member
1x454 1x75.25 2xred sun
pr0fesseur
Well-Known Member
LED TV are only BACKLIT with LED... so it doesent work...
pr0fesseur
Well-Known Member
Black Body Radiator (Degrees Kelvin)
The Kelvin rating of a light bulb can be misleading depending on the type of bulb. A black body will radiate at ALL wavelengths. The amounts at each wave length may be high or so low it is immeasurable but all wave lengths are emitted from a black body. Incandescent lights and the sun both represent a black body well in that ALL wavelengths are emitted. With these types of light one can measure the energy out put at two points in the light spectrum (normally near red and blue) and calculate the Kelvin rating.
Fluorescent lights as well as all gas discharge style lamps do not fit in this category. These have an interrupted spectrum. Light is not emitted at all wavelengths. There can be sections of the spectrum missing or there can be large spikes at various wavelengths. Since the Kelvin rating refers to a black body it does not accurately apply to fluorescent or gas discharge lamps. In the past, lighting companies used to use the term Apparent Color Temperature meaning that the color appeared to be at a particular Kelvin but was in fact a little off, due to the interrupted spectrum. This term was replaced with Correlated Color Temperature (CCT) and soon lighting companies just used the term Kelvin to refer to a lights apparent Kelvin rating.
pr0fesseur
Well-Known Member
AND for this reason I DO NOT LIKE 6500k bulbs...Black Body Radiator (Degrees Kelvin)
The Kelvin rating of a light bulb can be misleading depending on the type of bulb. A black body will radiate at ALL wavelengths. The amounts at each wave length may be high or so low it is immeasurable but all wave lengths are emitted from a black body. Incandescent lights and the sun both represent a black body well in that ALL wavelengths are emitted. With these types of light one can measure the energy out put at two points in the light spectrum (normally near red and blue) and calculate the Kelvin rating.
Fluorescent lights as well as all gas discharge style lamps do not fit in this category. These have an interrupted spectrum. Light is not emitted at all wavelengths. There can be sections of the spectrum missing or there can be large spikes at various wavelengths. Since the Kelvin rating refers to a black body it does not accurately apply to fluorescent or gas discharge lamps. In the past, lighting companies used to use the term Apparent Color Temperature meaning that the color appeared to be at a particular Kelvin but was in fact a little off, due to the interrupted spectrum. This term was replaced with Correlated Color Temperature (CCT) and soon lighting companies just used the term Kelvin to refer to a lights apparent Kelvin rating.
FOR YOU OKTHANKS2
BlueB
Active Member
They should have labeled the Zoo Med Ultra Sun bulbs 8500K or 10000K because they appear way more blue than that chart shows. Sure is confusing how they label them now. So does the CRI rating of 98 mean anything good for these lights? Or is that another meaningless number for growing pakalolo? What do you think of the lights I am using in my sig, will they be a good mixture?Black Body Radiator (Degrees Kelvin)
The Kelvin rating of a light bulb can be misleading depending on the type of bulb. A black body will radiate at ALL wavelengths. The amounts at each wave length may be high or so low it is immeasurable but all wave lengths are emitted from a black body. Incandescent lights and the sun both represent a black body well in that ALL wavelengths are emitted. With these types of light one can measure the energy out put at two points in the light spectrum (normally near red and blue) and calculate the Kelvin rating.
Fluorescent lights as well as all gas discharge style lamps do not fit in this category. These have an interrupted spectrum. Light is not emitted at all wavelengths. There can be sections of the spectrum missing or there can be large spikes at various wavelengths. Since the Kelvin rating refers to a black body it does not accurately apply to fluorescent or gas discharge lamps. In the past, lighting companies used to use the term Apparent Color Temperature meaning that the color appeared to be at a particular Kelvin but was in fact a little off, due to the interrupted spectrum. This term was replaced with Correlated Color Temperature (CCT) and soon lighting companies just used the term Kelvin to refer to a lights apparent Kelvin rating.
BlueB
Active Member
No, I was trying to humor the lad by saying go LeD grow light instead of trying to invent an LCD tv light for grow.