racookpe1978
Nuclear
- Feb 1, 2007
- 5,984
Almost a trivial question, but if I felt completely comfortable with my instinctive answer, I would not ask the question in public.
If a "standard" US UIL-rated commercial lamp socket (overhead fan, overhead light, or desktop lamp) is rated for a "classic" 60 watt bulb - assumed that is the stamped "maximum light bulb" that should be installed in that fixture, then what rated LED bulb can be safely used in the same socket.
Obviously, the current limits for the original rating are based on a classic incandescent light bulb, which emits 5-15% maximum energy as visible and useful light. Some of the remainder is I^2R losses caused by the electric current. The rest is heat energy that MUST also be dissipated. And, clearly a 60-watt equivalent LED bulb can be used in a 60 watt incandescent socket.
But the newer LED bulbs are much more efficient than the old ones, and emit more lumens that an old LED bulb with much less current, and many times the light output for a much smaller current than the original incandescent bulbs the UIL was using for their heat standard.
So, given the current and I^2R losses are much lower with a newer LED bulb, and the heat losses are much, much less with a newer LED bulb, is it prudent to use a larger 75 watt equal or 100 watt equal LED in the old 60 watt socket?
If a "standard" US UIL-rated commercial lamp socket (overhead fan, overhead light, or desktop lamp) is rated for a "classic" 60 watt bulb - assumed that is the stamped "maximum light bulb" that should be installed in that fixture, then what rated LED bulb can be safely used in the same socket.
Obviously, the current limits for the original rating are based on a classic incandescent light bulb, which emits 5-15% maximum energy as visible and useful light. Some of the remainder is I^2R losses caused by the electric current. The rest is heat energy that MUST also be dissipated. And, clearly a 60-watt equivalent LED bulb can be used in a 60 watt incandescent socket.
But the newer LED bulbs are much more efficient than the old ones, and emit more lumens that an old LED bulb with much less current, and many times the light output for a much smaller current than the original incandescent bulbs the UIL was using for their heat standard.
So, given the current and I^2R losses are much lower with a newer LED bulb, and the heat losses are much, much less with a newer LED bulb, is it prudent to use a larger 75 watt equal or 100 watt equal LED in the old 60 watt socket?