Brian Gaff (Sofa) wrote:
Well if they are generating heat then that is wasted power. However, they
are most likely electrically quiet, whereas the modern switch mode ones
pulse the leds hard and can be a swine if you want to listen to any am
radio!
Brian


Looking at some numbers, I have an old bulb with fins
that uses 15W. And a new bulb that uses 8.5W. Both
produce the same amount of light.

I would use the wasteful 15W input 800LM LED bulb
in the laundry room. The laundry room light does
not remain on.

For the kitchen light, the 8.5W input 800LM bulb would
pay for itself in one to three years or so. It depends
on exact usage pattern. But compared to the 15W one,
the payback on buying that newer bulb is worth it.

The old bulbs cost 7x what the new bulb cost,
in terms of purchase price. But since I've already paid
for the old one, that doesn't enter into the math.

All bulbs need attention to details. The LED bulbs
should not be used inside a "globe". They would overheat.
The old bulb in my example, the 15W one, says on
the side of it "for operation upright, only". So
not only does it have fins, it also has instructions
on correct orientation. Inverting the bulb makes it
run hotter.

Paul