These self-ballasting energy-saving Compact Fluorescent Lamps (CFLs) are excellent for small spaces and with low heat output.
So cool it can be touched without injury so can be used very close to plants. However, avoid moving the bulb while lit as it is more delicate. Avoid imitations. All wattage bulbs are available in blue dominant spectrum for growth or red dominant for flowering. 10,000 hours before intensity starts to diminish.