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.
A light-emitting diode (LED) also generates light from electricity from the excitation of a semiconduc â¦ tor junction. A fluorescent bulb can be used to create light from electricity by stimulating the chemical to fluoresce. Gaseous bulbs can generate light from electricity, such as a neon/argon/halogen bulb with a high-voltage applied to the gas inside. 1 person found this useful. Peter Forrest.