That's a low kevin bulb. 2700 for Flowering, the Red spectrum.Mostly for BLOOMING or FLOWERING.
Kelvin is a measure of temperature, as in 5100K or 2700K (this is the emitter temperature, not the actual temperature of the bulb itself), and it refers to the color of the bulb; 6500K being a blue light spectrum, and the 2700K being a red spectrum. Plants like a predominately blue spectrum during their vegetative growth and like red spectrum light during flowering. Together the 6500K and 2700K provide a dual, or complete spectrum, suitable for all plants during all phases of growth.
You'll need a High kevin bulb for Vegging.