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File:SpectrumLED.JPG

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English: Disassembled 7-watt LED light bulb (500lm) manufactured by Wojnarowscy. Perfect product for it's small price only 5€. There were found out next properties during examination:
  • Advantages:
    • high cosφ (0.6)
    • flickerings are totally missing
    • power supply is equipped by filters
    • very bright LEDs on board
  • Disadvantages:
    • energy class is "A+" despite cosφ doesn't exceed 0.6
    • bad construction of heat sink: power supply is arounded by hot environment which might destroy light bulb on long-time operation or even bring to fire in enclosed light appliences.
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Author Dmitry G
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current16:37, 16 August 2014Thumbnail for version as of 16:37, 16 August 20147,300 × 5,470 (10.67 MB)Dmitry G (talk | contribs){{Information |Description={{en|1=Disassembled 7-watt LED light bulb (500lm) manufactured by Wojnarowscy. Perfect product for it's small price only 5€. There were found out next properties during examination: *Advantages: ** high cosφ (0.6) ** fli...

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