Hello Chris,   
      
   In article , Chris Jones  wrote:   
   > If you connect two identical bulbs in series, then the voltage across   
   > each will be half of the supply voltage. So, connect another identical   
   > bulb in series. You won't find a simpler circuit!   
      
   Understood.  Thanks.  No spare bulb handy but can put a resistor in   
   series with the bulb.   
      
   Switched voltage halving would be more efficient.   
      
   A 6 V, 5 A adapter similar to eBay 305207182573 would be even better   
   but I haven't found one.   
      
   Thanks,         ... P.   
      
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