The couscous that is sold in most Western supermarkets has been pre-steamed and dried; the package directions usually instruct to add 1.5 measures of boiling water or stock and butter to each measure of couscous and to cover tightly for 5 minutes.he couscous that is sold in most Western supermarkets has been pre-steamed and dried; the package directions usually instruct to add 1.5 measures of boiling water or stock and butter to each measure of couscous and to cover tightly for 5 minutes.
Votes: 466. It depends so much on the quality of the LED fixture you got with the tank. Some LEDs can grow plants, but many of them cannot. You can put a clamp lamp that takes a compact flourescent bulb over a small tank and grow a lot of plants pretty successfully that way. Not quite as attractive, but they do work quite well.
LED light bulbs are a more environmentally-friendly alternative to incandescent bulbs. LED bulbs use a semiconductor device that emits visible light when an electric current passes through it. That property is known as elecroluminescence. Compact fluorescent s, the most common alternative to incandescent bulbs, use electricity to excite mercury gas until it emits ultraviolet (UV) light.