Re: when did "daylight" first come out ? « Reply #1 on: November 11, 2006, 10:05:05 PM » Author: TudorWhiz
Incandescent bulbs was invented long long long time ago in 1800s.... the Daylight color was the VERY first color for fluorecent lights which was the late 1930s
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	Re: when did "daylight" first come out ? « Reply #2 on: December 29, 2006, 10:45:48 PM » Author: Silverliner
The daylight was the first fluorescent phosphor when such lamps were introduced to the market in 1938. Shortly afterwards, colors such as 3500K White, Soft White, Blue, Green, Pink, and Red came out.
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	Re: when did "daylight" first come out ? « Reply #3 on: November 15, 2010, 09:51:40 PM » Author: icefoglights
I know Daylight was the first fluorescent phosphor.  About when did the other various fluorescent whites (3500k, Cool White, Warm White, C50, WWX/CWX, etc...) came out?  Which ones would have originally been zinc beryllium?
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	Re: when did "daylight" first come out ? « Reply #4 on: November 17, 2010, 04:57:56 AM » Author: dor123
This is way wrong. The first phosphor that fluorescent lamps used was Zinc Beryllium Silicate. it had only one shade of color: White (3500K). The halophosphors were the first type of fluorescent phosphors that their white shade can be varied, as well as to daylight light color (Primery because that the halophosphors are a blend of two materials that radiates in the blue and the orange part of the spectrum respectively and the color therefore can be changed by changing the ratio of these two materials).
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	Re: when did "daylight" first come out ? « Reply #7 on: November 19, 2010, 12:45:20 AM » Author: icefoglights
That's a great write-up.  Thanks for linking that
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	Re: when did "daylight" first come out ? « Reply #8 on: January 07, 2011, 08:15:15 AM » Author: SuperSix
Very interesting! I see that the name 'switch-start' was used back then for circuits with starter switches, I wonder when the name 'pre-heat' took over in the US? We've always stuck with switch-start in the UK, also written as two separate words 'switch start' or one 'switchstart'. Also interesting that resonant starting circuits were trialled but were sometimes found to fail to start the tube and then overheat. They were quite common over here a few decades ago and are known as 'semi-resonant start', 'resonant start' or sometimes 'resonance - double choke'.
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	Re: when did "daylight" first come out ? « Reply #9 on: January 08, 2011, 02:49:22 AM » Author: Medved
@Eliot: (Semi-)resonant start returned, as the principle of virtually all HF ballasts - they use the LC resonance effects to boost the voltage and most of them even to provide the filament heating. In fact i do not know any mains powered ballast design, that will not use this method. Only some low voltage DC supplied inverters (Flyback and Royer-oscillator based) do not use this method, but programed start ballasts for buses are again using Resonant start concept (the starting voltage could be controlled independently on the operating current, so it allow high line regulation necessary with batteries).
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