100W equivalent LED bulb

led lights on cars make my eyes go funny ...hate them

Domestic LED lights use DC and are more than bright enough for vehicle lamps, so why does the automotive industry need to strobe theirs?

And how fast does a car tail light need to strobe, so as not to be considered flashing by the construction & use rules, or whatever legislation governs these things?

Sure that's not just to keep the LEDs from cooking themselves? Probably easier (read cheaper) to strobe than use effective heatsinking...

That would only apply if they were more efficient when run from a pulsed high current than a constant lower one. It that true?

-- Richard

I have just fitted 84 of the 10W Integral LEDs (equivalent to 60W).

The beam angle is low IMHO

...and why use stupid LEDs in cars ayway ?

LEDs are smart in brake lights because they give a slightly earlier warning.

For a given current, 'strobing' reduces the average light output - the LED is only on for some fraction of the time. Pulse Width Modulation (PWM) and mark-space ration are words to Google.

The same LEDs are used for tail and brake lights. They're 'strobed' for tail (dimmer) and continuous for brake (brightest) to get the necessary brightness difference.

Cheers

will that help stop wummin drivers crashing in to you ? ....

And having no filament they should have a longer life.

Does that happen to you a lot? Perhaps you should learn which gears are forward and which are reverse.

A few months ago I got a few 13W from Ryness supposed to be a replacement for 75W incandescents (1060 Lumens), but they seem to us to be adequate replacements for old 100W bulbs, especially as you say the light is directed downwards a bit more than with an incandescent. Price not quite as ridiculous at £12 - might be good value if the claimed life is really reached:

I assume that other retailers have something similar.

At that price you may as well buy the Philips 18W MASTER LED Bulb (100W Replacement) Warm White bulbs which have a better colour (IMHO) and light distribution.

?9 in B&Q

would that help ? ...

That is all down to the range of frequencies they give out though. They try to fool the eye into thinking its white, but its got big holes in the spectrum apparently. Brian

Is it not something to do with duty cycle? Which reminds me, the new lower wattage versions of those bulbs may well be more efficient so they dissipate less heat, resulting in the lower wattage. The cheaper prices may well have been to clear the old stock.

Brian

Not often. But the last one to do so came out with a brilliant excuse after reversing out of her drive across the road and into my van.

"Its not my fault, you were not parked there when I put my car on the drive"

They use less energy that way.