2013년 11월 23일 토요일

About 'led.com'|week ending Nov 26







About 'led.com'|week ending Nov 26








Holiday               lights               are               a               tradition               for               many               people,               but               the               cost               can               be               hard               to               justify               these               days.

Plus,               the               usual               incandescent               lights               can               be               high               on               maintenance.

They               can               short               out               easily,               or               the               bulbs               can               burn               out               on               their               own,               and               sometimes               cause               other               bulbs               to               go               dark               as               well.

Now               there's               another               option:               LED               (light-emitting               diode)               lights.

They're               easier               to               maintain,               cheaper               to               use,               and               safer,               too.
               A               brief               description               
               Standard               incandescent               bulbs,               of               any               size,               produce               light               by               heating               a               filament;               when               the               bulb               "burns               out,"               it's               because               the               heat               has               finally               broken               the               filament.

LEDs,               on               the               other               hand,               use               electrons               moving               in               a               semiconductor               field.
               LEDs               have               actually               been               around               for               a               long               time.

One               of               their               earliest               uses               was               in               digital               clocks.

But               now               they're               being               developed               for               many               more               applications               -               one               of               which               is               holiday               lighting.
               Advantages               of               LED               holiday               lights               
               Unlike               incandescent               bulbs,               LEDs               aren't               made               of               glass,               so               they               can't               shatter.

They're               safer               for               other               reasons,               too.

They're               resistant               to               electrical               shocks.

And               they               don't               produce               heat,               so               they               won't               cause               burns               if               they're               handled               when               they're               lit.

The               lack               of               heat               also               makes               them               much               less               likely               to               start               a               fire.
               LED               bulbs               rarely               burn               out,               and               even               when               they               do,               the               other               bulbs               stay               lit.

You'll               need               to               replace               only               the               burned-out               bulb,               and               that               one               will               be               easy               to               locate.
               This               brings               up               one               of               the               biggest               selling               points               of               LED               lights               -               their               longevity.

They               can               last               up               to               100,000               hours,               which               experts               estimate               to               be               about               11               seasons'               worth               of               light.

How               often               do               you               have               to               replace               your               incandescent               lights?
               Longer-lasting               lights               also               cost               less,               because               you               don't               have               to               replace               them               as               often.

But               there's               another               reason               why               LED               lights               are               cheaper               -               they're               much               more               energy-efficient               than               incandescents.
               A               large               incandescent               bulb               on               a               string               of               holiday               lights               uses               7               watts               of               electricity.

That               may               not               sound               like               much,               but               compare               it               to               a               mini-bulb,               which               uses               just               0.45               watts.

Sounds               better,               doesn't               it?
               Now               check               out               LED               lights.

Each               LED               bulb               uses               only               0.043               watts.

That's               one-tenth               the               usage               of               a               mini-incandescent,               and               less               than               a               hundredth               of               what               a               large               incandescent               bulb               uses.
               Cost               issues               
               If               these               figures               seem               a               bit               obscure,               consider               the               effect               in               dollars.

The               estimated               cost               for               burning               a               string               of               300               large               incandescent               bulbs               five               hours               a               day               for               45               days               is               $76.

For               a               string               of               mini               incandescents,               that               amount               drops               to               $5.

But               for               a               string               of               LEDs,               it's               less               than               $.50.

That's               right               -               50               cents.
               LED               lights               do               cost               a               bit               more               to               purchase;               mini               incandescents               are               very               inexpensive               these               days.

But               if               you're               planning               on               using               holiday               lights               for               many               years               to               come,               you'll               save               money               in               the               long               run.

You'll               probably               have               to               replace               those               minis               several               times               -               some               of               the               cheaper               sets               last               only               a               year               or               two               -               in               the               time               you'll               have               the               LEDs.
               Availability               
               LEDs               can               be               a               bit               hard               to               find,               especially               late               in               the               Christmas               season.

That               will               change,               though,               as               they               become               more               popular.

And               increased               availability               will               probably               bring               the               price               down.
               Even               if               you               can't               find               LED               lights               this               year,               it's               worth               looking               for               them               next               year.

They'll               save               you               money               as               well               as               saving               resources               for               the               future.






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