Shoplight

For lighting in his new garage, he hung several rows of shoplights.

Source: wiktionary

But the typical kitchen window does not get enough light to grow healthy tomato transplants. How, then, can you grow your own? With an ordinary shoplight. You don't even have to buy those expensive plant lights.

Source: wiktionary

[…] how to keep this plant alive. Coincidentally, the following Sunday a local newspaper ran an article about a "new" method of growing plants indoors — placing them under fluorescent lights! Somewhat doubtful, I purchased a two-tube shoplight and suspended it over a bookcase upon which my one lonely violet stood. To my amazement and delight the plant not only survived, it thrived! […] If you build your stand or buy one, be sure you can raise or lower the trays or light fixtures. Shoplight fixtures are okay, but the tubes are too close to each other. People differ as to what light tubes are best.

Source: wiktionary

Each shelf has two 4-foot 2-tube fixtures. I also have a 4-foot 2-tube shoplight at one end of a workbench where I take cuttings, do potting and make terrariums and wall hangings. I intend to build a 3 or 4-shelf unit along another wall because I've run out of space. The lights are on 12-13 hours a day. Fortunately, the plant room does not experience temperature and humidity swings.

Source: wiktionary