You'll probably find more bulbs if you search for 18 inch bulbs rather than the metric measurement. As far as brands and color temp, I'd defer to the other poster.
this post was submitted on 26 Oct 2025
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I use one of these for the first two phases in a cannabis cycle, seedling and first growing stage. I have two Phillips MASTER PL-L with 4000K / 55W / 4800lm. They are very good for root develpment, but the low wattage means theres not enough oomph for bigger plants and your yield will suffer. Your regular growlight comes with 200W+ and different color for the flower cycle.
I'd say they are great for your first plants, but you will eventually upgrade.

