ROAD TO NOWHERE?

摘要

I am a lighting guy, have been for more than 20 years. The changes to our industry in the last 15 years have been somewhat turbulent, to put it mildly.Some of us were street lighting engineers who had to almost become semi-conductor engineers and start talking about quantum physics principles and spout impressive formulae, alphas and betas, least squares fit and so on.In the good old days if you wanted to find out what lumen output reduction you could expect over the useful lifetime of a lamp, for lighting design maintenance factors, you simply checked the lamp manufacturer's datasheet, LLD x LDD and off you went. With LED, this is not so straightforward anymore.