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Is it me or did I just imagine writing ' STREET LIGHTING' in my above post ?My clients house does not have traffic lights outside their house !!
I dont know about England, but in the USA, they use Green for go, you idiot, your holding up traffic, yellow for you should speed up to get by before it turns red, and red for stop, you numbskull, traffic is crossing the other way.
I have not seen them starting off white, although I have seem some that start red and then go yellow. This is because the yellow colour is from excited gaseous sodium atoms, which will emit strongly in the yellow part of the spectrum. Because at room temperature sodium is a solid, when the lamp is cold it doesn't have much in the way of sodium gas. Because of this they are filled with neon which is a gas at room temperature and allows the lamp to start up. When excited neon atoms glow red. As the lamp heats up the soidium evaporates and overpowers the quite weak neon light.I guess the lamps you were looking at were filled with something that glowed white to start with ( krypton may do this if my memory serves ) which is then overpowered as the sodium comes on line.
They first went pure brilliant white and then they turned ORANGE !!Why's that then ?
Hmm.. I always see it as orange when it is first turned on, or a red colour, then it gradually goes yellowy-white.
Hahaa!! Technically I wrote 10 times Iko and 9 times "is" SO HAAA! 
If you ask this fool on the hill which is the most amazing report about CLO in the recent past, he won't have any doubt:Maternal supplementation with very-long-chain n-3 fatty acids during pregnancyand lactation augments children's IQ at 4 years of age.Helland IB, Smith L, Saarem K, Saugstad OD, Drevon CA. Pediatrics. 2003 Jan;111(1):e39-44. To read the abstract click down here:http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&dopt=AbstractPlus&list_uids=12509593&query_hl=6&itool=pubmed_docsumPediatrics 2003, Norwegian research, scientifically sound:Children more clever at 4yrswith one spoon of CLO per dayduring pregnancy and lactation!Fig. 1. Scores on the K-ABC for children whose mothers had taken cod liver oil (n = 48) or corn oil (n = 36) during pregnancy and lactation. Values for the different subtests are shown. MPCOMP, Mental Processing Composite; SEQPROC, Sequential Processing; SIMPROC, Simultaneous Processing; NONVERB, Nonverbal Abilities. http://s-2000.com/hi-iq/images/hiqw1.gifhttp://www.innovationcanada.ca/18/images/rose_8-z.jpgNeat eh? ...when I've got this information my two sons had already grown up!Some people could still make it with their children.A good point to start a mini-review and/or discussion.iko
Gwrrr.. I will write long. OK?Iko is meanIko is fussyIko is kindIko is funnyIko is obsessed with Cod liver oilIko is obsessed with GarlicIko is called EnricoIko writes Ikod as his signatureIko is weirdIko is great Happy?