Just Wonderful
14th March 2008 - 02:48 AM
QUOTE (PIATLAS+Mar 11 2008, 06:24 AM)
Mercury vapor is very toxic, causing brain damage, retardation, insanity, blindness. .
How about sterility and senility.....gads, hope I never get it.
paul h
15th March 2008 - 01:05 PM
So what is the status on the LED bulbs? last time I looked into them the complaint was that they were still not omni-directional enough.
adoucette
15th March 2008 - 01:53 PM
QUOTE (paul h+Mar 15 2008, 08:05 AM)
So what is the status on the LED bulbs? last time I looked into them the complaint was that they were still not omni-directional enough.
They are WAY expensive and not particularly more efficient (current models) than CFLs.
Example
http://www.superbrightleds.com/specs/E27-G50-W6.htmThis LED bulb uses 6 watts and puts out 250 lumens (pretty low) can't operate above 23 C without fan cooling and can't be dimmed.
Its rated for 10,000 hrs (as long as you keep it cool) and costs $37.00.
Now compare this to a CFL:
http://www.bulbamerica.com/6x-Compact-Fluo...category_id=770This CFL uses 11 watts but puts out 480 lumens (more useful size (eq 60 watt Incand) and at the same watt per lumen as the LED), it can operate over a wider range of temps (and no fan), like the Led it can't be dimmed and its life expectancy is a bit less at 8,000 hours but its COST is but $6.00
LEDs appear to have a LONG way to go before they are competitive except in particular applications (they are essentially immune to vibration for instance, they can give a much more intense FOCUSED beam, and do it at low wattages and low heat)
Arthur
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