thelightingman 
							
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									| 							 I have always wondered what it means. 
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							I think HPS, MV, and MH rule!         Ban LED instead!   
		
				
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							Ash 
							
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									| 							 Pi Lamp. Shape of the tube = Greek letter Π (Pi) 
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							thelightingman 
							
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																Pi Lamp. Shape of the tube = Greek letter Π (Pi)
  Thanks.  
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							HomeBrewLamps 
							
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							~Owen
 
   Scavenger, Urban Explorer, Lighting Enthusiast and Creator of homebrewlamps     
		
				
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							thelightingman 
							
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							sol 
							
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																I thought it meant pholded lamp    
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							desktoptrashcan 
							
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									| 							 I’m guessing it stands for plug-in lamp. 
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							thelightingman 
							
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																I’m guessing it stands for plug-in lamp.
  Same here.  
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							wide-lite 1000 
							
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							dor123 
							
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									| 							 Philips is the first manufacturer to use the term PL for their external ballasted CFLs. 
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							I"m don't speak English well, and rely on online translating to write in this site. Please forgive me if my choice of my words looks like offensive, while that isn't my intention.
  I only working with the international date format (dd.mm.yyyy).
  I lives in Israel, which is a 220-240V, 50hz country. 
		
				
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							Desultory13 
							
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							James 
							
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									| 							 Ash is right, the original name for this was "Pi-Lighting", inspired by the shape of the two parallel tubes connected by a top bridge. I have never seen an official confirmation though for what "SL" meant for the equivalent range of self-ballasted CFLs of Philips.  I suspect that was just Dutch for Sparlamp = energy saving lamp. 
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