The second is the color spectrum it emits and what intensity of photosynthetically active radiation (PAR) is contained therein.
The second is the color spectrum it emits and what intensity of photosynthetically active radiation (PAR) is contained therein. Essentially, PAR means the type of radiation or energy with the correct wavelength that plants can use. Happily, most aquarists need not be too concerned with these details, as most hardy plants requiring low to medium lighting will perform well under the light fixture setup provided with your tank when used with bulbs rated for plants. Still, it pays to know why, so let’s explore more.