Tasty LED discussion thread

Olive Drab Green said:
Can someone explain to me why the T1-2100 only puts out 78 watts and 39 PAR watts? That seems relatively low. Not talking shit, but if I'm going to pull the trigger on it, I want someone to explain the science of this shit to me.
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Cob is ran at 2100ma so it's about 50% efficient which means about that many watts are going to PAR production. 161 lumens per watt total of about 12241 lumens total. PPF of about 158.

For a 2 foot by 1 foot tent you'd be crushing it with 850ppfd! I can't find that anywhere else for that price.
 
Rahz said:
I'll be adding the next batch of lamps with dimmer knobs soon. I'm cleaning the website up and have placed all the existing stock in a Clearance category, everything 10% off.

http://www.tastyled.com
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I wanted to ask you about your opinion on primary lenses & why they're not used on COBs. Have you ever considered using them for protection?
I've always wondered why cob lights do not have primaries? When learning, I always thought they were important at catching the light so to be used w/o diminishing allot. That is The pretty much the explanation I understood as to why they were used on diodes.
Last night I took the glass face off my 2, Lowes, Utilty-tech Pro shop-lights that I use for side-lighting. My observation seemed to be much less light. Is it just my eyes, or is this true? These shop-lights are not cobs but they are many diodes in a wide, center cluster. I doubt that matter though.
Do you have any insight on this topic. I've asked many people here awhile back & could never get an answer.
Figured you'd be the guy to ask.
Good luck w/ everything!
 
Hybridway said:
My observation seemed to be much less light. Is it just my eyes, or is this true?
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It's your eyes. The source is more diffuse when the lens is removed so less light makes it's way to your retina from what was the focal point of illumination.

I started out using lenses but switched to reflectors because they perform better. People manage to do a pretty good job at not harming their cobs. Not much different than a bulb in that respect.
 
cdgmoney250 said:
How so, if you don't mind my asking?
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The majority of light being emitted is on a straight path to the canopy and needs no lens or redirection. With a reflector the only light being affected by the optics is light that would fall outside the 90 degree cone. With a lens all the light is affected by the optics. So for instance, if a lens is 95% efficient then there is a 5% loss. If the reflector is 95% efficient but only 20% of the light is affected by the optics then there is a 1% loss.

In addition to that, as the optics age we're only talking about a percentage of light being degraded when reflectors are used while an aged lens affect the total output.
 
Rahz said:
The majority of light being emitted is on a straight path to the canopy and needs no lens or redirection. With a reflector the only light being affected by the optics is light that would fall outside the 90 degree cone. With a lens all the light is affected by the optics. So for instance, if a lens is 95% efficient then there is a 5% loss. If the reflector is 95% efficient but only 20% of the light is affected by the optics then there is a 1% loss.

In addition to that, as the optics age we're only talking about a percentage of light being degraded when reflectors are used while an aged lens affect the total output.
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So, what exactly is the advantages to primaries & why has it always been such a big deal to have them prior to cobs?
Nice Tasty grows BTW! :clap:
 
Hybridway said:
So, what exactly is the advantages to primaries & why has it always been such a big deal to have them prior to cobs?
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Without any optics a diodes radiation pattern will be around 120 degrees with a percentage even falling outside that cone. Running without optics can be done but the emitters/diodes will need to be very close to the canopy which also means the size of the lamp must be larger.

It costs less to make a small lamp with optics and hang it high. Less material cost, shipping cost, and less weight to lift for the end user.
 
Rahz said:
Without any optics a diodes radiation pattern will be around 120 degrees with a percentage even falling outside that cone. Running without optics can be done but the emitters/diodes will need to be very close to the canopy which also means the size of the lamp must be larger.

It costs less to make a small lamp with optics and hang it high. Less material cost, shipping cost, and less weight to lift for the end user.
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Actually, I think the phosphor coating is the primary if there is one on white cobs? I was thinking a thin price of glass or plastic would do the job cuz they don't bed them in silicone. But I'm having a hard time fully understanding. Read about this so long ago. I understood it as the silicone over the diodes in which captures the light & havests it for use is the primary. Anything that controls the beam angle is referred to as a secondary lens. When you're referring to optics, you'd be referring to a secondary lens I believe. This applies mostly non-cob lights as diodes have both in 1 watt & 3 watt versions. Silicone primaries & focusing secondaries. Follow what I'm saying?

Would'nt the phosphor coating be the primary?
Mind you, I'm just a grower here trying to understand more. You're one of the smarter guys around here I feel so I wanted to discuss this matter. If this is the wrong place to, lmk?! Thanks!
 
A primary lens does focus the beam but it may be too wide for the application so a secondary lens may be used. I've never seen the phosphor layer called a primary lens. Optics for cobs are generally just called optics, lenses/reflectors.
 
Rahz said:
A primary lens does focus the beam but it may be too wide for the application so a secondary lens may be used. I've never seen the phosphor layer called a primary lens. Optics for cobs are generally just called optics, lenses/reflectors.
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So, No advantage to a thin flat lens over the cob? That would be considered the primary. Not to focus. That could be considered running bare cobs, instesd if it showed more generated light on the meters? Have you tried this? Sometimes the advantages of these silicone & secondary lenses outweigh the little bit of light loss through the glass.
 
I'm not sure what the optical purpose of a lens that didn't focus would be, but I like and use reflectors because I don't want anything between the cob and the canopy. I do appreciate the consideration though.
 
I have run COB's bare and with lenses as well as with reflectors. I havn't found a way that I don't like and have gotten great results and been very pleased. COB's just put so much useful light that it is hard to fuck up.

Less than a year ago I was looking for a cob grow light and had about 2 or 3 choices. I ended up with a w90 from a51 and an Optic Vero 120 watt, the one in the lunch box. Both do well. Just went all cob in flower with a Northern Grow Lights Photon 180 added. Lots and lots of light with surprising coverage and excellent build. Hard to pick between all the sponsors' products and I am happy with the Photon.

My choice was hard between the Tasty and the Photon was like picking a favorite child. Hard to screw up here also.
 
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