This page is for people who want to find out how much Lumen different lamps can have.
Look on the links at the bottom of this page for the Wikipages about energy saving lamps and on the page for LED lamps.
Use Google translate to have the Dutch text translated into your preferred laguage.
Packaging should tell
On the packaging of the lamp there has to be a code which will tell you what kind of light it will give.
Codes for different colours
Colour codes
- 29(-530) – warm white
- 33(-640) – cool white
- 25(-740) - nutral white
- 54(-765) - cool daylight
- 827 – extra warm white (livingroom warm tint)
- 830 – warm white (shop warm tint, office)
- 840 – cool white (shop white, office)
- 865 – cool daylight (daylight white)
- 930 – warm white – wide spectrum (winkel warmtint, office)
- 940 – cool white – wide spectrum (winkel white, office)
- 950 – daylight – wide spectrum
- 965 – cool daylight – wide spectrum (daylight white)
Colour temperature
The colour temperature (kleurtemperatuur) can be measured in Kelvin or Mired (= 1 millione devided by the colour temperature in Kelvin).
| Light Intensity | Kelvin | Mired |
|---|---|---|
| extra warm white | < 2700 K | 370 M |
| warm white | 2900 – 3000 K | 333- 345 M |
| neutral white | 4000 K | 250 M |
| cool white | > 5000 K | 200 M |
Comparison energy usage
In example the energy saving lamps (the middle column) will tell how much Watt the lamp takes and in the left column it will tell the Lumen value.
Energy usage comparison
| Light Intensity | LED | Energy Saving (Fluorescent) | old style light bulb (Incandescent) |
|---|---|---|---|
| 50 lm | 1,2 W | ||
| 100 lm | 15 W | ||
| 200 lm | 2 W | 5 W | 25 W |
| 300 lm | 3 W | ||
| 400 lm | 6 W | 8 W | 40 W |
| 500 lm | 8 W | ||
| 600 lm | 11 W | ||
| 700 lm | 12 W | 60 W | |
| 800 lm | 12,5 W | 15 W | |
| 900 lm | 16 W | 75 W | |
| 1100 lm | 18 W | ||
| 1300 lm | 20 W | 100 W | |
| 1500 lm | 23 W | ||
| 1800 lm | 27 W | ||
| 2100 lm | 33 W | 150W |
So in this last table one can see that using an energy saving lamp of 33 Watt will give the highest Lumen value necessary for lighting your documents.
The downfall is that they are still very expensive to purchase. On this moment it is not clear if they will work longer then LED. Both having a long life span.
Illumination
The illumination of a light source, the light emitted by the source. This is expressed in millicandelas for LEDs (MCD). 1000 millicandelas equals 1 candela . The brightness, for example, 590,000 mcd.
MilliCandela to Lumens calculation chart
| Milli Candela | Beam angle | Divided by |
|---|---|---|
| 5° | 167,22 | |
| 10° | 41.82 | |
| 15° | 18.50 | |
| 20° | 10.48 | |
| 25° | 6.71 | |
| 30° | 4.67 | |
| 35° | 3.44 | |
| 40° | 2.64 | |
| 45° | 2.09 |
To approximate the amount of lumens, calculate the number of candelas divided by the number in the radiation angle column of the light (see http://nl.wikipedia.org/wiki/MR16).
Example: 590,000 mcd = 590 cd , a lamp with a beam angle of 40 °, is therefore 590 / 2.64 = 223.48 lumens.
Information from
The code tabells are derived from the information from the following organisations CIE, ISO (NEN) and
ANSI.
Links
- http://nl.wikipedia.org/wiki/Spaarlamp
- http://nl.wikipedia.org/wiki/Ledlamp
- http://nl.wikipedia.org/wiki/Lichtstroom
- http://nl.wikipedia.org/wiki/MR16
- http://en.wikipedia.org/wiki/Compact_fluorescent_lamps
- http://en.wikipedia.org/wiki/Led_lamp
- http://www.lrc.rpi.edu/programs/nlpip/lightingAnswers/mr16/abstract.asp