You are now viewing Pages. Click Nodes for cloud view. Incidents and Anecdotes Throughout its long and fascinating history, daylight saving time has had a remarkable impact on a wide variety of unexpected areas--from Middle East terrorism to feuding twin cities, voter turnout to time-change riots, radio stations to trick-or-treaters, and opera performances to manslaughter charges.
This radiation could aggravate symptoms in people who already suffer skin conditions that make them exceptionally sensitive to light. However, industry sources claim the UV radiation received from CFLs is too small to contribute to skin cancer and the use of double-envelope CFLs "largely or entirely" mitigates any other risks.
At closer distances, comparisons show that CFLs emit less UVA long wavelength radiation than incandescent light bulbs. They do, however, emit higher levels of UVB short wavelength radiation. Closed double-envelope CFLs are shielded and emit a lower total UV radiation compared to incandescent or halogen bulbs of a similar wattage.
For the average user, UV radiation from indoor lights does not appear to be a concern. For those with skin sensitivity long term indoor exposure may be a concern, in which case they may want to use a bulb with lower UV radiation output.
There seems to be more variability within bulb types than between them, but the best option is shielded CFLs. A study comparing cellular health effects of CFL light and incandescent light found statistically significant cell damage in cultures exposed to CFL light.
No cellular damage was observed following exposure to incandescent light of equivalent intensity. In areas with coal-fired power stations, the use of CFLs saves on mercury emissions when compared to the use of incandescent bulbs. This is due to the reduced electrical power demand, reducing in turn the amount of mercury released by coal as it is burned.
EPA published a data sheet stating that the net system emission of mercury for CFL lighting was lower than for incandescent lighting of comparable lumen output. This was based on the average rate of mercury emission for U.
In the United States, the U. In areas where coal is not used to produce energy, the emissions would be less for both types of bulb. The amount of mercury released by one bulb can temporarily exceed U. A Maine Department of Environmental Protection DEP study of comparing clean-up methods warns that using plastic bags to store broken CFL bulbs is dangerous because vapors well above safe levels continue to leak from the bags.
Fluorescent lamp recycling Health and environmental concerns about mercury have prompted many jurisdictions to require spent lamps to be properly disposed of or recycled, rather than being included in the general waste stream sent to landfills.
Safe disposal requires storing the bulbs unbroken until they can be processed. The retail price includes an amount to pay for recycling, and manufacturers and importers have an obligation to collect and recycle CFLs. Northwest have the option of disposing of these products in the same way they dispose of other solid waste, in Oregon "a large majority of household CFLs are going to municipal solid waste".
Many municipalities are purchasing such machines.
Greenhouse gases[ edit ] In some places, such as Quebec and British Columbia incentral heating for homes was provided mostly by the burning of natural gaswhereas electricity was primarily provided by hydroelectric power. An analysis of the impacts of a ban on incandescent light bulbs at that time introduced the notion that in such areas, heat generated by conventional electric light bulbs may have been significantly reducing the release of greenhouse gases from natural gas heating.
This electromagnetically-excited acoustic noise comes from the vibration of the magnetic core of the ballast subject to electromagnetic forces. Use and adoption[ edit ] Main article:When local daylight time is about to reach.
Sunday, November 5, , am clocks are turned backward 1 hour to. Sunday, November 5, , am local standard time instead. Sunrise and sunset will be about 1 hour earlier on Nov 5, than the day before. About Daylight Saving Time. United States Law 15 U.S.C. ¶6 (IX) () Time zones and daylight saving time; United States Code Title 15 - Commerce and Trade; Chapter 6 - Weights and Measures and Standard.
Daylight saving time (DST), also daylight savings time (United States), also summer time (United Kingdom and others), is the practice of advancing clocks during summer months so that evening daylight lasts longer, while sacrificing normal sunrise times.
Typically, regions that use daylight saving time adjust clocks forward one hour close . A compact fluorescent lamp (CFL), also called compact fluorescent light, energy-saving light, and compact fluorescent tube, is a fluorescent lamp designed to replace an incandescent light bulb; some types fit into light fixtures designed for incandescent bulbs.
The lamps use a tube which is curved or folded to fit into the space of an incandescent . Spells Dancing Lights - Eyebite Dancing Lights.
Evocation [Light] Level: Brd 0, Sor/Wiz 0 Components: V, S Casting Time: 1 standard action Range: Medium ( ft. + 10 ft./level) Effect: Up to four lights, all within a ft.-radius area Duration: 1 minute (D) Saving Throw: None Spell Resistance: No.
Depending on the version selected, you create up . The Uniform Time Act of made Daylight Saving Time a federal law that exempts only the states that voted to keep Standard Time.
The problems created by Daylight Saving Time outweigh any benefits of energy savings, if those savings really exist.