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.
There are 3 types of bulbs that work well as grow lights: metal halide, high pressure sodium (HPS), and fluorescent. Each type of light fixture has its own advantages and drawbacks. 1  Metal halide bulbs are compact and efficient, producing a very intense light from a small bulb.