While the presence of invasive green iguanas and tegu lizards in Florida are attributed to the pet trade, other non-native species have made their way to the state through international trade practices. One example is the Cuban tree frog, which was thought to make its way to Florida via carg...
In a single year, the use of CFLs over incandescent bulbs removes as much greenhouse gas pollution as taking 800,000 cars off the road [source: Illinois EPA]. Drawbacks of CFL Bulbs Compact fluorescent light bulbs do have a few issues that put people off. First, they deliver their best...
Can LED lights be left on all the time? Yes, LED lights are ideal for places where light needs to be left on all the time. You don’t have to worry about high electricity bills because LED bulbs consume low power and generate less heat. Do LED lights burn out? Typically, LED...
There are many different sized grow lights, from the CFL light bulbs you already use in your house to bigger, more specialized grow lights that produce pounds of bud at a time. There are indoor growing options for nearly everyone, even if you’re on a budget or only have a small space...
Light bulbs are ranked by their power -- the amount of light they put out in a certain period of time (measured in watts). Higher-watt bulbs have a bigger filament, so they produce more light. A three-way bulb has two filaments of different wattage -- typically a 50-watt filament and...
However, if you pick the right strain and live in a good environment, it can be much cheaper to grow outdoors, since you don’t have to provide everything for your plants. The sun will do a lot of the most cost-heavy work for you by providing a free grow light. ...
How Blue Light Impacts Your Sleep Your eyes have special receptors called “photoreceptors” that constantly track the amount of light in your environment. When your eyes register that the environment around you is dark, it sends a signal to your brain’s time-keeping center, the suprachiasmatic...
Rather than just focusing on GDP, over 40 different sets of criteria from health, education and civil society engagement have been measured to get a more rounded assessment of how countries are performing. 出自-2017年考研阅读原文 It is not yet clear how much more effective airline security has...
These days, high-intensity color LEDs are showing up everywhere such as the traffic lights. The reasons for the rapid switchover are simple. Incandescent bulbs have to be replaced annually, but LED traffic lights should last five to ten years. LEDs also use 80 to 90 percent less electricity...
How Light Bulbs Work How Lightning Works How Power Grids Work How Living Off the Grid Works How Magnets Work Is it possible to generate electricity directly from heat? Why is it that some appliance plugs have three prongs and others have only two? Are fluorescent bulbs really more efficient ...