What is a ‘Perfect’ LED grow light

There is a popular saying,For a perfect led grow lights ,they shoud reach to these atandards below:

1.Red LEDs within the range of 620-710nm with special attention provided for the 660nm wavelength
2.Blue LEDs 425-495nm
3.UV LEDs 300-400nm
4.Far-red LEDs 710-800nm (especially around 730nm)
5.(Avoid white LEDs if you can)
6.they should all be brand-name 3W LEDs
7.a cooling system consisting of a metal base,  heat sink, and multiple cooling fans
8.Constant-current circuitry to run the LEDs

And now i would like advertise here for it is really brilliant for spider  cob led grow lights

 

 Clearly, most of the current lighting systems in use today don’t cover all the wavelengths that are required by plants, or if they do, they also include wavelengths that are not required and possibly detrimental to plant growth. One way growers get around some of these issues is to use different combinations of lights, for example, High Pressure Sodium (HPS) in combination with Metal Halide (MH) will cover the full spectrum but this has high cost and low life-expectancy issues. The HPS / MH combo, like the full-spectrum fluorescent lighting, also emits in the yellow and green light wavelengths, which as I have said before, would be preferable to avoid. So, our current electric lighting systems appear to be both inefficient and more costly, and may even be preventing us from reaching the full potential of our gardening ambitions! So there is certainly an argument for using LED grow lamps if we could only just get the lighting characteristics right