Its not about money its about medical condition. See my posts above.
I read those posts. My point was thatI hope my jargon is not incomprehensible . . .
- Not everyone suffers from that medical condition (howbeit not everyone is handicapped, and we have people suing under the Americans with Disabilities Act to require accommodations which are far more intrusive than not forbidding the sale of incandescent lights).
- 60Hz alternating current heats the bulb’s filament to a white heat, and that heating actually occurs at 120 Hz and higher harmonics thereof. The filament has thermal inertia; its temperature and therefore its brightness does not drop to zero (or anything like it) when the current instantaneously drops to zero twice in each sinusoidal cycle. That is why your husband tolerates the light of an incandescent bulb so much better than that of an LED which experiences 60Hz alternating current.
- Although it is inevitable that the electrical energy input to any household light will be 60Hz AC, it is possible - even routine - for that power input to be converted to (essentially) steady Direct Current. Every charger for a phone or laptop computer includes a rectifier. People who are bothered by LED light are not, I presume, necessarily bothered by the light from a laptop computer - and yet the laptop computer’s screen is nothing but an array of LEDs.
The implication would be that you could arrange a circuit with rectifier diodes and coils, capacitors, and/or rechargeable batteries which you could interpose between the 60Hz AC power and the LED. That circuit would provide the electrical equivalent of the thermal inertia of the incandescent bulb, and the result would be that the light from an LED fed by such a circuit would be flicker-free.
- My point in referring to the efficiency and service life advantages of the LEL was only in the context of the cost you would incur to implement the circuit I propose. My proposal would cost money, without a doubt - but not necessarily more money than the LED would save you in electricity cost and in the cost of the shorter life of the incandescent bulb.