How Do You Know Is Fluorescent Light Bulbs Are Burnt Out?

Since it is a Fluorescent light, it could be several things. I will try to put them in order of likely problems. The way a fluorescent light works takes several steps. The bulb is filled with a gas. It has a starter (ballast) that ignites the gas. (Sorry for a long answer). Most likely scenario in order: 1. the bulb is burned out ( normally the glass has a black ring near the ends) 2. the ballast is bad (inside of the fixture) 3. the power is off (breaker) 4. the switch is bad

1. Do low energy light bulbs emit fluorescent light?

There is no such thing as "fluorescent light". A fluorescent bulb is named such, because an electrical charge causes excited electrons to hit the phosphurous coating the inside of the bulb, causing it to glow, or fluoresce. You might mean do they emit ultraviolet light? A tiny amount, not harmful "sitting under fluorescent lights for eight hours is equivalent to only one minute of sun exposure."

2. Which one bears a resemblance to sunlight, fluorescent light bulb with color temperature 5,000K or 6,500K?

6500K would be good for a task light, or a reading light. I would not use it for general room illumination

3. Fluorescent light bulb still blinking after turned off.?

just guessing that the ballast is leaking current

4. How does one dispose of a compact fluorescent light bulb ? Apparently, they contain mercury.?

Compact fluorescent bulbs WILL NOT leak mercury while you are using them. But you should handle them with care so that you do not break them. Like most things, there is a trade off. If you are worried about global warming and energy security, the benefits will far exceed any risk from toxicity. Just make sure to recycle them. IKEA now accepts old CFLs, and Environmental Defense is working with Wal-Mart to start a similar take-back program. If you can not find a store in your area to do this, Just do not throw in your trash!!

5. Compact fluorescent light bulbs (CFLs) and Hybrid/electric cars. Is it all a green lie?

As for the mercury bulbs, ya...you are completely correct...it's gotta go somewhere. Hybrid cars are the best alternative right now, because hydrogen is more costly (energy wise) to produce and then burn, than it would be to just burn gasoline as it is. Think about the energy required to make the glass bulbs though...how much longer to the CFLs last? I am sure the math works out. The only permanent solutions to our energy problems are those that increase efficiency, or decrease use. Nuclear and hydroelectric plants are more efficient. Other than those two options, using electric cars that run off a hydroelectric power grid is probably about as good as it gets right now. As for the disposal of batteries...lithium ion batteries can be recycled, as can Sodium Nickel Chloride...no one uses lead acid batteries in electric cars - they can only be discharged to 65% and retain a useful life cycle. The typical electric car's batteries would be useful for well over 100,000 miles which equates to 7 years for your average driver, and battery technology is getting better all the time. You can take off your tin-foil hat. The oil companies' profit margins are falling. Our democrats successfullly stopped them from building new refineries and digging for more abundant oil sources, so prices will only go up until we run out in a couple hundred years. They are not trying to maximize profits, they are trying to usher in an era of new technology (unsuccessfully). Wolf Harper, I would like to talk to you about this over a cup of coffee... About the forests: we do need to plant more trees instead of cutting (or worse, burning) them down. However, saying that we are better off because there are fewer coal plants is ridiculous....we are still polluting at a disturbing rate...and how are we going to keep up with the growing population - by polluting more. There is no immediate solution to our energy and pollution problems. The amount of CO2 put out by factories > The amount exhaled. By a whole heck of allot. Tungsten and glass is biodegradable? This is news to me. Besides, CFL's are not the lamp of the future, oLEDs are.

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Market Lighting Affects Nutrients.
Many people reach toward the back of the fresh-produce shelf to find the freshest salad greens with the latest expiration dates. But a new study led by Agricultural Research Service scientists may prompt consumers to instead look for packages that receive the greatest exposure to light--usually those found closest to the front.The study was led by postharvest plant physiologist Gene Lester while in ARS's Crop Quality and Fruit Insects Research Unit, in Weslaco, Texas. Lester and colleagues Donald Makus and Mark Hodges found that spinach leaves exposed to continuous light during storage were, overall, more nutritionally dense than leaves exposed to continuous dark. Lester is now with the USDA-ARS Food Quality Laboratory in Beltsville, Maryland.For the study, the researchers exposed spinach leaves to light similar to the 24hour artificial fluorescent light received by spinach in packages located at the front of the display case. A second group was enclosed in two-layer-thick brown grocery-bag paper to represent the "dark treatment." Both experimental groups were housed in market-type, light-transmissible polymer tubs with snap-tight lids and were kept in walk-in storage chambers at 4[degrees]C--the same temperature at which markets currently display packaged spinach. The light reaction of photosynthesis is not temperature dependent and can occur at 4[degrees]C in the right type of light.The researchers found that the continuous light affected the leaves' photosynthetic system--resulting in a significant increase in levels of carotenoids and vitamins C, E, K, and B9, or folate.While the simulated retail light conditions actually helped the stored leaves gain in content of several human-healthy vitamins, some wilting occurred after 3 days of storage in flat-leaf but not crinkled-leaf types.Continuous light exposure during retail display combined with specific cultivar selection (crinkled-leaf types) and leaf maturity (baby-leafed size) appears to be the strategy for preserving and enhancing the concentration of spinach-derived human-health bioactive compounds.Results from this work were published in the Journal of Agricultural and Food Chemistry.--By Rosalie Marion Bliss, ARS.Gene E. Lester is with the USDA-ARS Food Quality Laboratory, 10300 Baltimore Ave., Beltsville, MD 20705-5129; (301) 504-6128, .*
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