What’s all this stuff about capacitive power supplies for LEDs?
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Watch This Guy Turn On A 20,000 Watt Light Bulb – Motherboard.
And I was impressed by the 400 watt light bulbs they used to have at SUNY Plattsburgh in the Conference Rooms. Even with Albany's pricey residential electricity, this light bulb would only set you back $3 an hour to operate -- assuming you had 166 amp line at 120 volts or 83 amp at 240 volts.