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It is possible to find a full spectrum desk lamp on sale on Amazon under the seller "Lights of America." The company Verilux at their home site also sells them. It is also possible to find these types of lamps at Home Depot.
There are many places one can find Verilux Happy Lights. Check out electronics stores such as Best Buy or Future Shop. Also take a look at Amazon, which tends to have lower prices.
Only in the 'visible light' spectrum.
spectrum
Indigo
You need grow lights which are in another light spectrum. Regular lights won't do as well to help your plants.
White light contains all the colors of the visible spectrum.
electromagnetic spectrum is called as the spectrum because it consists of different lights like radio waves, micro waves, infrared, visible light, ultra violet light, x-rays, gamma-rays
On a sunny day, or in an inside room with the lights on, it is all around you.
ultraviolet
green spectrum
The visible spectrum is red, orange, yellow, green, blue, indigo, and violet. You can remember this by remembering ROY G. BIV as a man's name.