Light is radiation, you can grow plants with any light whatsoever given it provides enough photons to activate the photosynthesis process.
You can grow with pure red, pure blue any combination you want, they will grow very differently and not very well when compared to "full spectrum"
Cannabis plants can detect light using photoreceptors that detect light from 350nm to 650nm or thereabouts.
What we mean by full spectrum is basically just "all the colors" white itself is not a color it's just all the colors at varying levels of intensity mixed into one "light" the brighter the light the more "lumens" or luminosity.
White light is generally measured in Kelvin, this is gives you a general idea of the majority of colors within a white light, 2-3000 Kelvin will be warm with lots of reds, this simulates ☀️, cold winters bring 5-6000 Kelvin with alot more blues. This simulates winters/early spring.
Next up you want
LED - Light emitting diodes
SMD - Standard micro device
All board manufacturers actually sell are a couple smd leds stuck to a hunk of metal with some strings and a power driver....
100watts
200 watts whatever..
Like computer chips the technology moves so fast, light chips that were good last year are ok 2 years later.
Look up the latest smd led
I think it's somewhere like smd 5053 , spend 30 40 min looking at different types / pros and cons etc.
All a manufacturer