Slash’s Lighting data Thread.

[Slash]

Hi Slash what do think about the mammoth lights especially the one with the emerald green spectrum?

Mammoth LED Light 860W 8Bar With Emerald Green|Hydroponics guru|

www.hydroponicsguru.com.au

Hi mate, I know little about the Mammoth lights at this point and have never come across one yet. Mammoth is a reputable brand and I would expect them to have a decent light. You can get a bit of an idea by what components they are running to get a general idea of the lights potential. I’ll take a bit of a look at them on line and see if I can give you a general opinion on whether they might be good. Sometimes the big brand lights can be a bit pricey for what you get.

 

[Slash]

Here's one for ya's.. I'm thinking of down-sizing and doing something along the lines similar to @afghan bob has going on. Whereas i have a 2' x 4' tent/cabinet where i raise them in vegetative stage, and stick them outside to flower. Just wonder, what's a good full spectrum LED light for that size tent these days?

Hi mate, if I was going to use the light/lights for just vegging under before flowering outside, I would look at lights with a veg spectrum/higher blue. There’s some good ones out there these days. If on the other hand you want the option to be able to flower under it, I’d go for a normal full spec, or better still get a light with adjustable spectrum, veg and bloom channels which is the type of lights I prefer to work with.

 

[Billygoat]

Hi mate, I do go to Brissie at least a couple of times a year. Happy to catch up and do some testing for you. Can do Par mapping for lights etc

Testing day at GG’s shop! That would be cool.

 

[Green Genius]

Testing day at GG’s shop! That would be cool.

We would definitely be keen to put on something like this

 

[Slash]

Hi Slash what do think about the mammoth lights especially the one with the emerald green spectrum?

Mammoth LED Light 860W 8Bar With Emerald Green|Hydroponics guru|

www.hydroponicsguru.com.au

Hi mate,
Had a bit of a read up on the Mammoth and it seems good in many ways, I am just a little dubious about the spectrum they are using and I can’t find a spectral chart for them anywhere. They have high end components using High end Samsung diodes and the Evo mint greens are the most efficient with highest output there is currently. The problem with the mint green is the spectrum misses the mark in a way for horticultural lighting so if you use too many in a single array then you end up with more green and yellow than a plant can use so it ends up being wasted energy. Theoretically on the spectral charts I’ve published, any time any colour peaks above the white line, it becomes light energy the plant can’t use, therefore becoming wasted energy. Plants only need and can use a quite limited amount of yellow and green light. The thing that would worry me the most about this light is the spectral peak is at 437nm. Most high performing lights have a spectral peak somewhere close to 660nm deep red which is the peak of the spectrum for photosynthesis and the point in the spectrum for flower development and makes most sense to me for that to have the peak at 660. I can only guess that the use of the mint greens is the reason for this.

 

[Slash]

We would definitely be keen to put on something like this

Sounds like a cool idea, everyone bring their light in and find out what you are getting out of your light

 

[Slash]

Here's one for ya's.. I'm thinking of down-sizing and doing something along the lines similar to @afghan bob has going on. Whereas i have a 2' x 4' tent/cabinet where i raise them in vegetative stage, and stick them outside to flower. Just wonder, what's a good full spectrum LED light for that size tent these days?

Hi mate, not sure if you wanted my personal opinion on this question or not but if it where me and I had that space and was doing indoor/outdoor I think I would personally use a SuperTechLED QS2 Veg model. First reason is from my experience, using a bluer veg style light for vegging and then the change of spectrum when going out into the redder spectrum of the sun seems to ignite the flowering and in my opinion you will get better results this way. I think this is also true indoors and if you veg with a higher Kelvin light then use lower Kelvin for flowering, the plants respond well to it, I’m pretty sure it’s a hormonal response. Some of our more veteran growers may be able to relate that vegged with metal halide then flowered with HPS.
The second reason would be the coverage size would be ideal for that size.
I’ll also add one more reason is that they are damn good lights IMO

 

[Slash]

Here's one for ya's.. I'm thinking of down-sizing and doing something along the lines similar to @afghan bob has going on. Whereas i have a 2' x 4' tent/cabinet where i raise them in vegetative stage, and stick them outside to flower. Just wonder, what's a good full spectrum LED light for that size tent these days?

There’s some really good looking 3 and 4 bar lights on Alibaba designed for 2ft x 4ft coverage. Many with high end components at really decent prices.

 

[Slash]

Black Sun AC COB light 300 watt
PPFD @ 50cm - 328
Colour Temp - 3016 Kelvin
CRI - 87

 

[Slash]

The Black Sun runs 9 x AC COBs. The output of the light is fairly poor and demonstrates why not many manufacturers are using AC components as their output is still way behind DC output
(Not sure why there is an attachment with the jet on this post, a glitch of some kind?)

 

[Slash]

Vipa Spectra 1000 XS Pro (100w)
PPFD @ 50cm - 226
Color temp - 3742
CRI - 91

 

[Slash]

The Vipa Spectra lights are pretty cheap lights. Good CRI, spectrum is not really on point IMO, fair bit of wasted light with excess levels of green and yellow and I think the blue is a little excessive. The big downer on this light(not sure if other Vipa Spectra’s are similar) the output of this light is too low to grow nice flower with. Even with this light really close to the canopy, you are not going to be able to achieve target light levels you are looking for in flower. Sometimes you are getting what you pay for which is the case here.

 

[Goonie Goat]

 

[Slash]

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You doing a build mate?

 

[Goonie Goat]

You doing a build mate?

Yeah soon, just a light for my 2×4, got spare drivers I need to put to use haha.