General spectra solution is "full spectrum+custom red", which has been proved well broadly for cannabis plant, a public secret nowadays. It seems that the competition is about how to costdown for it--branding or non-famous driver, branding or non-famous LEDs, structure/housing costdown......
At the 1st round competition, many factories won by a single product, and even nowadays, many still stick to this strategy and the only difference is to make efforts for costdown purpose.
But horticulture ligthing is systematic science, which requires various hydroponics tools or equipment at different stages for the plant grow, how can one single light to win for all the plant stages? So that the really professional supplier is always thinking systematically and by long term view for the product planning and development.
Soul of a grow light is the spectra, which influences the yields greatly. So, it's vital for the innovative factory to have various database for the testing approved spectrums for different applications as options.
· database is much large than shown
There are quite expereiced master grade growers, or very experienced horticulture lighting companies, who do have the special requirement for spectras tunable, which should not be the consideration for the ordinary growers or product product portfolio of hydro stores.
· such special spectra demand should not be the consideration of ordinary growers, because it requires experience and good knowledge about why, when and how to use the right spectrum at the right grow stage at the right time, otherwise, the plants may be damaged......
So comes the plug-in bars upon the preferred spectrum to be relased to meet such customized requirement to make a Spectra Tunable Grow Light.