I just bought a couple of new shop lights and wondered what kind of bulbs would be best and also cost efficient.
New fixtures use the new T8 bulb. It uses less electricity and puts out as much or more than the old T12 bulbs.
Bulbs also come in a number of colors from Day Light (5000K), Warm Light and Cool Light (6500K).
Most of my research indicates that the Cool White bulbs are as good as the special Grow lights which are much more expensive. They do lack some of the red spectrum, so some sites recommend using a mixture of incandescent and cool white. That seems a bit complicated and more expensive.
In my experience over the years, plants do well under just about any types of fluorescent lights.
Here are the sites which talk about lights.
- University of Alaska – Cool White
- U of Missouri – combination of Cool White and Incandescent
- HydroFarm – Cool White
I’ve decided to do a mixture of Cool White and Warm Light/Daylight bulbs.
This light fixture is available from Home Depot or Amazon. It does seem to be built better than the typical shop light and can also be plugged into each other. They also have a pull on/off switch.