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  1. J

    Nearly half of U.S. households use LED bulbs for all or most of their indoor lighting

    But creating art and reproducing art are not the same thing. What makes tubes great in guitar amps is what makes them poor for home audio (or at least less than ideal).
  2. J

    Nearly half of U.S. households use LED bulbs for all or most of their indoor lighting

    It is rather stupid isn't it given the efficiency gap between electricity generation with thermal and heating.
  3. J

    Nearly half of U.S. households use LED bulbs for all or most of their indoor lighting

    I understand the market of what is out there, but forcing it on installation makes no sense as it is not reasonable without remote controls, of which there is no suitable standard.
  4. J

    Am I the only one who drives the speed limit?

    Any law, that is based on opinion or "it has always been that way" has little legitimacy in the first place. Vehicle speed limits are far too often arbitrary. Really pass state exams once per year? Professionals generally don't take exams every year, though they may need to take courses to...
  5. J

    Nearly half of U.S. households use LED bulbs for all or most of their indoor lighting

    - In California, minimum CRI must be 90. That increases energy usage. - In California most lights must be dimmable - A 100K warranted lifetime totally unnecessary for home use, and even for commercial questionable - 125 lumens per watt ... perfect being the enemy of good. Try that with 2700K...
  6. J

    Nearly half of U.S. households use LED bulbs for all or most of their indoor lighting

    Is it never summer where you live? Can't imagine it is much colder where you live than where I live. Heat runs 6 months of the year, for varying times of course. Gas heat has always been far cheaper than electricity, and when we switch soon to a heat pump, again, the bulb will make quite an...
  7. J

    Nearly half of U.S. households use LED bulbs for all or most of their indoor lighting

    The "resurgence" of vinyl is at best a dead cat bounce. Streaming is enormous in comparison. Did you know a good number of people who buy records don't even have something to play them on, and most that do are not using high end equipment. Hard to find anyone but old stuck in the past...
  8. J

    Disappointing trend in LED manufacturing

    And again, you have no clue what you are talking about. Just stop already. Anyone can find an online SOC versus voltage charge and see that basic calculations are eluding you. Just stop already.
  9. J

    Disappointing trend in LED manufacturing

    He understood what you are saying. What you are saying is wrong.
  10. J

    Disappointing trend in LED manufacturing

    Again you are talking about things you really have no clue about. Static electricity does not damage LEDs from over-current it damages from over-voltage. It literally punches through diffusions without the LED ever conducting as it is often a reverse bias situation. LEDs are quite robust w.r.t...
  11. J

    Disappointing trend in LED manufacturing

    You are skeptical because you don't have the first idea of what you are talking about or even a hint of practical or professional experience and I apologize to the moderators if that is harsh, but it is quite obviously true. YES they are doing PWM right from the battery with a resistor. NO they...
  12. J

    Another "black light" that isn't

    Treat it with care. Could be dangerous to your eyes.
  13. J

    Another "black light" that isn't

    And you need a ton of it to kill anything. Not very practical.
  14. J

    Disappointing trend in LED manufacturing

    Some yes, practical standpoint no. A true 10W led will take 10x its rating for 0.01 seconds if it is of any quality. Remember they are just diodes and diodes usually can take fairly high pulse energy, 30-100x for short periods. Of course in automotive, there will always be something to protect...
  15. J

    Disappointing trend in LED manufacturing

    Dave_H, linear regulators for interior lighting had a go there for a few years, and even for exterior single voltage applications. The issue was not efficiency, but line rate flicker. Line rate flicker (and flicker in general) has become more of an issue the last 3-5 years. It is not acceptable...
  16. J

    Disappointing trend in LED manufacturing

    And you have designed how many professional LED products that have gone into mass production and for automotive? I know the answer to that question is 0. Let me state again. RESISTORS are a PERFECTLY ACCEPTABLE method of setting current in many applications and automotive is definitely one of...
  17. J

    CRI and efficacy of RGB arrays versus white LEDs?

    13 Year old thread. Are you trying to show off?
  18. J

    Disappointing trend in LED manufacturing

    I always assume it is a show off / ego thing.
  19. J

    Disappointing trend in LED manufacturing

    NO! Most of the street lights in the US are assembled in North America. Street lights are one area where the penetration of Chinese products is relatively low in lighting due to the high cost of failures. Most installed street lights ARE mainstream brands. Why do people feel the need to post...
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