I have had good success blooming a variety of plants using 60w equivalent LED daylight bulbs from Walmart (or wherever LEDs are sold). They look natural, no purple alien colors, and fit a standard socket. I use them in an adapter so there are three close together, but you could also increase your output by getting more powerful light bulbs
I would suggest cutting off the plastic bulb they come with. Your light output will be greater. I use a rotary tool (like a Dremel) but a $10 hack saw works just as well. The diodes are flat against the harder, white part and you would be hard pressed to damage them by accident as long as you are semi-cautious.
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