Letters to the editor

摘要

I agree with Richard, but for almost the totally opposite reason. The issue I come across is manufacturers trying to achieve the lowest capital cost scheme by specifying too few luminaires. This is almost always done by using a Maintenance Factor of 1 or 0.95 when a realistic value might be 0.7. In other words, an independent assessment would show that you would need 40% more luminaires to achieve the correct value of maintained illuminance. You can imagine the conversations I have had with clients who pay me a fee to tell them that they need to spend an extra 20-40% more on luminaires! In my opinion, the advantage of using an independent lighting consultant is in the name. The client receives independent, unbiased advice. You might need more or you might need fewer luminaires. And don't get me started on the quality and accuracy of manufacturers' technical literature.