Call us on 1300 788 626 to find out about the best light meter deals and sales on light meters at discount prices.
Many of our light meters are used to check indoor and ourdoor light levels for workplace health an safety applications, if you need some advice please give us a call - advice is free!
Use our lux meters to check night lighting levels on construction sites - office lighting levels and much more.
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What lighting levels do I need?
The Australian standard for required workplace illumination AS1680.1.2006 offer the following advice:
| Class of Task |
Recommended Maintained illuminance lux
|
Characteristics of the activity/interior |
Representative activities/interiors |
| Movement and Orientation |
40 |
Interiors rarely visited with visual tasks limited to movement and orientation |
Corridors, cable tunnels, indoor storage tanks; walkways |
| Rough Intermittent |
80 |
Interiors requiring intermittent use with visual tasks limited to movement, orientation and coarse detail. |
Staff change rooms; live storage of bulky materials; dead storage of materials needing care;locker rooms;loading bays |
| Simple Workplace tasks |
160 |
Any continuously occupied interior where there are no tasks requiring perception of other than coarse detail. Occasional reading of clealry printed documents for short periods. |
Waiting Rooms, staff canteens; rough checking of stock; rough bench and machine work; enterance halls; general fabrication of structural steel; casting concrete; automated process monitoring; turbine halls. |
| Ordinary or Moderately easy work tasks |
240 |
Continuously occupied interiors with moderately easy visual tasks with high contrasts or large detail |
School chalkboards and charts; medium woodworking; food preparation; counters for transactions. |
| Moderately Difficult work tasks |
320-400 |
Areas where visual tasks are moderately difficult with moderate detail or with low contrasts |
Routine office tasks eg reading, typing, enquiry desks. Inspection of medium work; fine woodwork; car assembly |
| Difficult work tasks |
600 |
Areas where visual tasks are difficult with small detail or with low contrast |
Drawing boards; most inspection tasks;proofreading;fine machine work; fine painting and finishing; colour matching |
| Very difficult work tasks |
800 |
Areas where visual tasks are very difficult with very small detail or with very low contrast |
Fine inspection;paint retouching; fine manufacture; grading of dark materials; clolour matching of dyes. |
| Extremely Difficult |
1200 |
Areas where visual tasks are extremely difficult with extremely small detail or f low contrast. Visual aids may assist |
Graphic arts inspection; hand tailoring; fine die sinking; inspection of dark goods; extra fine benchwork |
| Exceptionally Difficult |
1600 |
Areas where visual tasks are exceptionally difficult with exceptionally small detail or with very low contrasts. Visual aids will be of advantage. |
Finished fabric inspection; assembly of minute mechanisms, jewellry and watchmaking. |
What to look for in light meters
For accurate measurement of illuminance you should ensure your light meter should has cosine and colour correction. The cosine correction allows for the effects of light falling on the cell at oblique angles, colour correction is needed in order to match the spectral sensitivity of the human eye.
There are a number of cheap lightmeters in Australia, they are both cheap in dollar terms and in construction - they have poor quality colour correction because of the lower quality colour correction filters they use. They tend not to fit the red or blue ends of the CIE V, lamda curve. Errors as much as 500% can occur in high pressure sodium or metal halide lighting.
Further information is available from Light Lab International Pty Ltd www.lsa.com.au
Want to know more about light meters? We recommend wikipedia http://en.wikipedia.org/wiki/Light_meter as a great place to search.
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