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Lighting question.

Q. Which classic effect illuminated by electrical lighting demonstrates Archimedes' Principle?


Z.
  • Lava Lamp

  • gkenyon:

    Lava Lamp




    Yes indeed, it is the Lava lamp of 1960s fame. It is getting increasingly difficult to get R39 filament reflector lamps for the lava lamps these days. A large retail catalogue retailer sells lava lamps but not the spare replacement bulbs. L.E.D. lamps just won't do as they do not create sufficient heat to warm the wax. I have resorted to using 25W oven lamps.


    Well done Mr. Kenyon.


    Z.


  • It is getting increasingly difficult to get R39 filament reflector lamps for the lava lamps these days. A large retail catalogue retailer sells lava lamps but not the spare replacement bulbs. L.E.D. lamps just won't do as they do not create sufficient heat to warm the wax. I have resorted to using 25W oven lamps.





    There seem to be a few available on a rather large online book retailing site?

  • gkenyon:




    It is getting increasingly difficult to get R39 filament reflector lamps for the lava lamps these days. A large retail catalogue retailer sells lava lamps but not the spare replacement bulbs. L.E.D. lamps just won't do as they do not create sufficient heat to warm the wax. I have resorted to using 25W oven lamps.





    There seem to be a few available on a rather large online book retailing site?

     




    Thanks,


    Z.