Lighting / Fluorescent Lighting
Fluorescent lights produce much less heat than HID lighting, are very energy efficient and can be placed very close to the plant. All come in both red and blue spectrums for veg and flower.
Overall their output will never compare to that of HID lighting which should definitely be the preferred choice when growing, especially flowering. Fluorescent do have their uses; they are perfect for propagation and raising young plants and are also ideal for small spaces where heat would be an issue, or even just for the grower who is on a budget. They can also be added as side-lighting alongside your HID lights to ensure even bigger yields! The T5 lights are especially good for placing over propagators for when you are looking after your seedlings and cuttings.