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Physics — LED Bulb Energy Flow

An LED bulb wastes far less energy than a filament.

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LED bulb: energy flowElectrical input100Useful light40Heat (driver and LED)60Conserved — 100 in, 100 out, across 3 nodes and 2 flows. The widths add up.3 nodes named only by a flow — `Electrical input`, `Useful light`, `Heat (driver and LED)`. They are drawn under the bare id with no label, which is also what…Conserved: 100 enters at `Electrical input` and 100 leaves at `Useful light`, `Heat (driver and LED)`, and every one of the 0 nodes between them passes on exa…

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title "LED bulb: energy flow"
flow "Electrical input" "Useful light" 40
flow "Electrical input" "Heat (driver and LED)" 60