Qualm entered English in the 16th century, with meanings like doubt and uneasiness.. Usually a qualm comes from doubt about an action and a feeling that you are doing, or are about to do, something wrong. It isnt a bad feeling about another person's behavior but about your own.
The newest type of grow lights use LED technology. One major advantage to the LED lights is the small size. LED lights are only a few inches in diameter and are easy to mount. In some greenhouses, LED lights may be the only practical light option.
Fluorescent light are fine for the vegetative state and the flowering period. When your plant is in the vegetative state, you will use cool, white fluorescent lights and when it reaches the flowering state, use warm, white fluorescent lamps.