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AC Powered White LED Circular Magnifier Work Lamp

Step 11Power On

Power On
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  • LED o-light 19 un-focused.jpg
  • LED o-light 20 focusing.jpg
  • LED o-light 22 through lens.jpg
,

Stand back, plug it in and flip the switch! Mine worked on first try, of course, and so should yours!

Shine your new light on a blank area at a good working focal distance. Final tune the LEDs individually to work out dark spots etc. The main pix shows mine before and after tuning the LEDs.

You will notice how it seems there is less light output than the florescent lamp. This is because the LEDs are focused through the gel head that directs the light specifically to your working area rather than everywhere else. That is exactly what we desire in a magnifier lamp.

So it does really work. Lets compare.

Philips Circline 8 inch General Purpose

Color = Cool-White Light

Color Temperature = 4100K

Dispersion Pattern = 360 degrees

Expected Life = 10,000 (4 years based on 6 hour days)

Energy Used = 22 watts

Light Output = 1050 lumens

LED Replacement Light, Instuctables Project

Color = a Cool White Light

Color Temperature = 7000K

Dispersion Pattern = 12 degrees

Expected Life = 1000,000 hours

Energy Used = about 4.2 watts

Light Output =
610 lux at 16 inches
1340 lux at 12 inches
1900 lux at 10 inches
2700 lux at 8 inches
2270 lux at 6 inches
940 lux at 4 inches

Ok, so I will not bother to go into all the difficult mathematical details about this (I'd have to understand them first). Basically lumens stated on the flourescent light are dispersed everywhere while the LEDs have a narrow light beam so a comparison is difficult. The lux measurements above were taken with an LX1010B Digital Lux Meter. As a comparison my bench-top measures 490 lux and is illuminated by 2x 48 inch 40 watt florescent tubes suspended 5 feet above.
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2 comments
Mar 13, 2010. 5:03 AMskarfac3 says:
how did u manage to calculate the lux level....do you have a tool for these? 

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