Led Users Unite!

Viagro said:

Sounds good KaptK. Are you growing under your Blackstar?

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yeah blackstar has 30 sourd x ssh in a SOG under it right now at my caretakers house. Im just going through seeds for us so he doesnt have the possibility of infecting his room with pollen from an undesireable male or herm. Or just pollination in general unless we want to pollinate.

chazbolin said:

Thanks for your response. I'm familiar with efficacy as it refers to visible spectrums and kelvin falling within those spectrums does not pick up PAR levels. That's what got me curious if you use Kelvin as absolute value when deciding what lamp to use for the PAR level you're after for a plant. It seems to me to an imprecise value for deciding PAR wavelengths.

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I look at the graphs of light bands used by plants to produce chlorophyl, etc. The link I posted from the guy that makes LED lights in UK explains the colors that plants truly need. So much misinfo used as selling points with LEDs. The simple graphs that Kessil has, have clued me into what's best. I'm astonished by the results with their little lights. I can't stress this enough. (They should pay me..LOL...but they don't.)

edit: There is only one spectrum of light, it includes visible and invisible light. The part of the spectrum used by plants in the invisible range is discussed by more knowledged references than me. That's why I pointed you to the guy in the UK's tech info.

Kaptain Kron said:

yeah blackstar has 30 sourd x ssh in a SOG under it right now at my caretakers house. Im just going through seeds for us so he doesnt have the possibility of infecting his room with pollen from an undesireable male or herm. Or just pollination in general unless we want to pollinate.

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Are you happy with its performance?

Viagro said:

(They should pay me..LOL...but they don't.)

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Some LED companies give gift card money for good reviews. Call them up and tell them how many hits your grows get. I'm sure they'd send you another light or something.

Of course you will have to be very clever as to collecting said free endorsement light, but I'm sure it's possible.

I think it's respectable. I'd love to get a discount on good products that I stand by.

Checking out the Kessil site and it looks like they don't refer to Kelvin for possibly this very reason. The PAR values are invisible anyway so producing a 'daylight' visible light would let the 'Spectral Halo' due in the spring 2011 emit a white light but still be spectral or full spectrum. That my friend is a game changer. Do you think Kessil omits Kelvin for these reasons or am I just missing something when I read their specs?

Viagro said:

I look at the graphs ofl light bands used by plants to produce chlorophyl, etc. The link I posted from the guy that makes LED lights in UK explains the colors that plants truly need. So much misinfo used as selling points with LEDs. The simple graphs that Kessil has, have clued me into what's best. I'm astonished by the results with their little lights. I can't stress this enough. (They should pay me..LOL...but they don't.)

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They (Kessil) say they don't waste leds on unnecessary parts of the spectrum, their lights are super efficient. When they say full spectrum for their new Spectral Halo lights, I'm not sure if they mean the entire light spectrum or the full spectrum of what plants use.

Kelvin is translatable, so it's not hidden in the woodwork, that's what I was trying to point out earlier.

If you contact them, they'll send you a newsletter.

I appreciate your learned response and hope I'm not beating this to death. I too see Kelvin as translatable within the visible spectrum so I don't think it's being used as hidden in the woodwork but as a bit of a marketing ploy by some mfg's to sell both blue and red regions inside the visible spectrum.

I like the Kessil products. They look well made and perfect for some of my applications. In fact if they are going to emit a white light that tells me they are going to have to have UV levels or we would not be seeing white at all. The bonus of course if they are emitting IR in PAR wavelengths invisible to the eye. But if there is a white light, or any color at all why not associate it with a Kelvin rating like HID and CFL mfg do unless they, Kessil, recognize it's little relevance to PAR.

Viagro said:

They (Kessil) say they don't waste leds on unnecessary parts of the spectrum, their lights are super efficient. When they say full spectrum for their new Spectral Halo lights, I'm not sure if they mean the entire light spectrum or the full spectrum of what plants use.

Kelvin is translatable, so it's not hidden in the woodwork, that's what I was trying to point out earlier.

If you contact them, they'll send you a newsletter.

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Because LED light isn't measured on the k scale, that's why translation is necessary.

Kelvin is the absolute measurement of thermodynamics, from absolute zero on up.

interesting....so then LED is only measured in nanometers, with no corresponding Kelvin value if I have understood you. When ordering LED I should only be concerned with the bandwidths is that correct?

chazbolin said:

I appreciate your learned response and hope I'm not beating this to death. I too see Kelvin as translatable within the visible spectrum so I don't think it's being used as hidden in the woodwork but as a bit of a marketing ploy by some mfg's to sell both blue and red regions inside the visible spectrum.

I like the Kessil products. They look well made and perfect for some of my applications. In fact if they are going to emit a white light that tells me they are going to have to have UV levels or we would not be seeing white at all. The bonus of course if they are emitting IR in PAR wavelengths invisible to the eye. But if there is a white light, or any color at all why not associate it with a Kelvin rating like HID and CFL mfg do unless they, Kessil, recognize it's little relevance to PAR.

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chazbolin said:

interesting....so then LED is only measured in nanometers, with no corresponding Kelvin value if I have understood you. When ordering LED I should only be concerned with the bandwidths is that correct?

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Wavelengths, yes. Except for white leds, which use the k scale. For example, warm white (2800k, more or less) provides far red out to about 800 Nm.

edit: btw The K in Kessil "...represents the unit of measure for color temperature in "Kelvins.""

(from their website)

Viagro said:

Are you happy with its performance?

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ecstatic so far we will see what the final product looks like but so far they are beasting out hard. I love that panel =) but i think it could be even sicker if i ran two kessil magnetas in conjunction with it ^_^ but its so not neccesary im just trying to go overkill because i am working in small spaces right now so i dont mind spending a little extra on lights to get that little bit extra. I need to but i tell you what im so stealth lol people in the house where its at dont even know its there and they stay in the room right next to it.

Kaptain Kron said:

ecstatic so far we will see what the final product looks like but so far they are beasting out hard. I love that panel =) but i think it could be even sicker if i ran two kessil magnetas in conjunction with it ^_^ but its so not neccesary im just trying to go overkill because i am working in small spaces right now so i dont mind spending a little extra on lights to get that little bit extra. I need to but i tell you what im so stealth lol people in the house where its at dont even know its there and they stay in the room right next to it.

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You won't believe what those little lights will do.

Ill be finding out shortly hopefully they work because im doing research phase for my CG right now with these lights because eventually im going to be able to have my show at my house and not over there any more and when that happens my lights come with me and he needs to stay stealth so hes letting me find out and then hes going to purchase some after we see how they work. He's sold on the blackstar already =) just wanna try the kessils too.

...kessil, seriously *drool*. saw them at an expo, man i want to pickup a magenta so badly, christmas bonuses are supposed to come in this friday haha, we shall see

the guys at the expo had a few of the 21 led array chips on hand, it was cool to look at up close and personal, they also had a couple of the oldschool 4 led array chips which was also interesting, the 4 led version was actually a bit bigger than the 21 led version used in the kessil lighting

i had a fun conversation with cammie of hydro grow led, telling me how theirs are the best in the world and etc.., the leds they use in the product are the best and most advanced in the world etc...i postulated, "yo, what if you guys licensed the kessil technology, their led is the most advanced from this lamen's point of view" she/he paused for a second and actually thought about what i was proposing, quick to dismiss it though cammie retorted, "well it'd just get way too hot! then you have to have way more cooling, nobody's going to buy it, it totally defeats one of the main purposes of having an led lamp!"...i wound up leaving with a couple of the budget glowpanel 45s at the end of the day, dreaming of kessil ever since though

Took delivery of the newest version of the Blackstar 240 W panel. 2 of them actually. Incredibly bright. Have all 3W Cree LEDs. This version is meant for both veg and flower. Has White LEDs . Need to review the specs for exact wavelengths. Not on any websites yet. Just blown away by how much brighter they are than a 300w Chinese panel even considering different spectra. Think I may have found a perfect light for my needs. My plants will be the judge. LOL

Smokefrogg- Very interesting story. Sounds like Cammie just says what she's told. Hydro Grow lights look good to me, but I'd like to see them against Kessil in a fair fight. Might be something to see. I don't think Kessil will be sharing their tech with other companies, they are out to conquer the LED world. They've got a tiger by the tail, and they know it.

That said, I wouldn't mind test driving one of those ProwGrow panels. Or Cammie, for that matter. LOL

longranger said:

Took delivery of the newest version of the Blackstar 240 W panel. 2 of them actually. Incredibly bright. Have all 3W Cree LEDs. This version is meant for both veg and flower. Has White LEDs . Need to review the specs for exact wavelengths. Not on any websites yet. Just blown away by how much brighter they are than a 300w Chinese panel even considering different spectra. Think I may have found a perfect light for my needs. My plants will be the judge. LOL

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Did they keep the uv and ir LEDs in this model? I'd like to swap mine out for warm white or red. Or even blue, for that matter.

I need to find somebody that can work on these lights.

After spending 24 hours bouncing around various led threads and websites i think is its gonna come down to either the-----Blackstar 240w or a Kessel Red.........any thoughts???? Im currently growing with cfl's..

kush groove said:

After spending 24 hours bouncing around various led threads and websites i think is its gonna come down to either the-----Blackstar 240w or a Kessel Red.........any thoughts???? Im currently growing with cfl's..

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If you want to buy a Kessil, to grow start to finish, get a purple or a magenta. The Blackstar can handle the full cycle.

(You can get Kessils for 250, don't pay 300)

The Kessil red is a great idea if you veg with something else.

kush groove said:

After spending 24 hours bouncing around various led threads and websites i think is its gonna come down to either the-----Blackstar 240w or a Kessel Red.........any thoughts???? Im currently growing with cfl's..

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The Kessil H150 Red is a booster light for when you need that extra flowering power - best go with a Magenta for flowering or a Purple for all round growing.