Hey
For the nutes, you are correct, ffof has some stuff already in it so you need anything for the first 2-3 weeks, and then you can start them off with 1/4 strength of what it says on the bottle. For autos you just want to use some of their Big Bloom threw out the grow and Tiger Bloom when they start to flower, I don't use Grow Big because there's not a lot of veg. growth. I always feed like that water, water, feed, water water, feed..but that's just me I think everyone has their own schedule.
For the lights, you want to use MH for veg. and HPS for flowering, 6500K is for veging your plant and 2700K is for flowering.
Color temperature is a characteristic of
visible light that has important applications in lighting, photography, videography, publishing, manufacturing, astrophysics, horticulture, and other fields. The color temperature of a light source is the
temperature of an ideal
black body radiator that radiates light of comparable
hue to that of the light source. In practice, color temperature is only meaningful for light sources that do in fact correspond somewhat closely to the radiation of some black body, i.e. those on a line from reddish/orange via yellow and more or less white to blueish white; it does not make sense to speak of the color temperature of e.g. a green or a purple light. Color temperature is conventionally stated in the unit of absolute temperature, the
kelvin, having the unit symbol K.
Color temperatures over 5,000K are called
cool colors (blueish white), while lower color temperatures (2,700–3,000 K) are called
warm colors (yellowish white through red).[SUP]
[1][/SUP] This relation, however, is a psychological one in contrast to the physical relation implied by
Wien's displacement law, according to which the spectral peak is shifted towards shorter wavelengths (resulting in a more blueish white) for higher temperatures.
The color temperature of the
electromagnetic radiation emitted from an ideal
black body is defined as its surface temperature in kelvins, or alternatively in
mired (micro-reciprocal kelvins).[SUP]
[3][/SUP] This permits the definition of a standard by which light sources are compared.
To the extent that a hot surface emits
thermal radiation but is not an ideal black body radiator, the color temperature of the light is not the actual temperature of the surface. An
incandescent lamp's light is thermal radiation and the bulb approximates an ideal black body radiator, so its color temperature is essentially the temperature of the filament.
Many other light sources, such as
fluorescent lamps, emit light primarily by processes other than thermal radiation. This means the emitted radiation does not follow the form of a
black body spectrum. These sources are assigned what is known as a
correlated color temperature (CCT). CCT is the color temperature of a black body radiator which to
human color perception most closely matches the light from the lamp. Because such an approximation is not required for incandescent light, the CCT for an incandescent light is simply its unadjusted temperature, derived from the comparison to a black body radiator.
View attachment 2432087
