1. Have individual lamps failed?
2. Are the luminaires soiled?
3. Do lamps flicker when activated or in operation?
----- If the answer to any of the above questions is YES, you should clean
the luminaires and replace faulty lamps.
4. Is your lighting installation more than 15 years old?
5. Is there too little light at your workplace?
6. Do you feel dazzled when you are working?
7. Do you see reflections or mirror images on your screen?
8. Do you wish you had a way of switching or dimming the lighting?
------If the answer one of questions 4 to 8 is YES, you should check the lighting installation.
------If the answer to two or more of the questions is YES, it is time to think of refurbishment.
------If you answered YES to all four questions, you should call a professional straight away and arrange for a refurbishment concept to be drawn up