Does a full spectrum CFL have red and blue light? Would a Spiral CFL - 26 Watt - 100W Equal - 5000K Full Spectrum be ok for an indoor lemon tree or do I need to buy a red light and a blue light? Thank you, Becky
Full Spectrum CFL Lights for Lemon Tree
Certified GKH Gardening Expert
Full spectrum CFLs are supposed to be more similar to daylight and one labeled as 5000K would have light output that averages 5000K, probably including multiple colors. But the quality of this may vary by manufacturer. If the packaging includes a graph of the spectrum the bulb provides, you will be able to see if it provides sufficient red and blue light.
A more traditional (and perhaps more reliable) method would be to buy one "red" 2700-3000K bulb and one "blue" 5000-6500K bulb.