2300 and 5600 is the measure of specturm of light given off by bulb in kelvin. What it's telling you is that you have a bulb that puts out red and blue light and all thats inbetween. Whats not said is how much of what kind of light, either way your fine. Differnet growers have different opions on what kind of light to use when. some say a blue bulb is better for veg and red bulb is better for flower, some use the blue through out, some use the red through out some use a blue/red through out, its kind of a perference thing