I'm just wondering if this type of CFL light bulb would be fine to grow? it hasn't got warm white or cool white on it so I'm confused? Sent from my iPhone using Grasscity Forum
It'll work, unless it produces green light. The "warm" and "cool" thing is only a secondary consideration when getting your lights set up. It really only matters for maximizing yield. The thing that matters most is getting enough light to begin with.
Those wilko bulbs are 2700k which is warm white, and work perfectly well for growing. Many people prefer to use them for flowering but use 6400k for vegging but you can use either for both, it's not that important
What he said... Those are good bulbs. They Should be used with Hoods / reflectors and mixed with Cool White bulbs of the same wattage. If you can find higher Wattage those are (26w) you should go fore 55w or even 100w CFL Spirals. Both "spectrums" are important for the Artificial Light "bandwidth" of your grow.