What is  lumens ?....

The unit of measure commonly used to describe LED intensity is the millicandela (mcd), 1000 millicandela equals 1 candela.


Candelas measures how much light is produced as measured at the light source. The unit of measure commonly used for most other light sources is the Lumen. Lumens measure how much light actually falls on a surface.

 

How much light do I get from incandescent bulb, fluorescent tube, Economic bulb ?....

 

 

TYPE Power Intensities luminous Equivalent bulb incandescent Dimension
Bulb incandescent - 220V AC 25 W 220 lm - -
Bulb incandescent - 220V AC 40 W 420 lm - -
Bulb incandescent - 220V AC 60 W 710 lm - -
Bulb incandescent - 220V AC 100 W 1360 lm - -

Economic Bulb - 220V AC

8 W 400 lm aprox. 40 W -
Economic Bulb - 220V AC 12 W 600 lm aprox. 60 W -
Economic Bulb - 220V AC 15 W 900 lm aprox. 75 W -
Economic Bulb - 220V AC 21 W 1200 lm aprox. 100 W -
Tube fluorescent - 220V AC 58 W 4500 lm aprox. 100W + 100W + 100 W 150 cm
Tube fluorescent - 220V AC 36 W 2800 lm aprox. 100 W + 100 W 120 cm
Tube fluorescent - 220V AC 30 W 2100 lm aprox. 60 W + 100 W 90 cm
Tube fluorescent - 220V AC 18 W 1150 lm aprox. 60  W + 40 W 60 cm

  

How do I  transform lumens in milicandels  ?...

Conversion  bi-directional  lumens ( lm ) <=>  milicandels ( mcd )

Introduce

       

Results  

 
  

Lumens       

=

 

lm  it's aprox. equal with  mcd

Milicandela 

=

 

mcd it's aprox. equal with   lm

  

How do you convert lumens to mcd ?
There is not an exact conversion since they are different types of measurements but here is a rough conversion:
If you divide the number of lumens by 12.57 you can get the equivalent candelas, candelas times 1000 = mcd

 

lm = 0,01257 x mcd     sau     mcd = lm x 79,5544

 

(c) Copyright 2004 LP ELECTRIC SRL. all Rights Reserved