LED Bulbs - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 4 Old 07-27-2019, 11:34 PM Thread Starter
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LED Bulbs

A comment came up recently relating to the most recent LED headlight bulbs, some of which are now rated 80w.

How can that be ...... ? Such bulbs are frequently used to reduce the load so that the owner can reserve output, particularly when heated gear is used. So how can replacing your 12v 55/60w bulb with a pair of 12v 80watts be of any benefit?

First off I had handy the OEM bulb from my Versys-X 300. Checking the actual watts by using a meter and converting to watts by using the formula ampsXvolts I found that bulb to be 12v 35/45w.
I then checked the leftover Beamtech 25/25w LED, which are advertised as 50w but are declared 25w by the paperwork in the box. This bulb actually consumed 1.01 amps (12.2w).

Conclusion: Advertising hype! The advertised wattage of LED bulbs not only states the wattage for the PAIR of bulbs, but also doubles the actual current draw! Why? Who knows - perhaps bigger is always better. I also have a spare pair of H4 Ironwalls which I was going to check, BUT, neither the bulbs, the leaflet, or the box state any wattage.

Probably those 80w super dooper LED's you just bought draw 20watts each. Lumens and lux are what really matter, but how can you believe what they tell us. I would suggest that peer reviews should be your guide when purchasing LED's..

BTW the OEM 12v 35/45w Versys 300 bulb was not marked (didn't all bulbs once have their specs punched into the metal base?) but my owners manual states that it should have been 12v 55/55w!

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post #2 of 4 Old 07-28-2019, 11:20 AM
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When I got my el cheap-o LED's from China and installed them on the '04 Wee the charging voltage went up a few 10th's and the light coming out of the headlight bucket got whiter and brighter.
That is worth the difference for me. I've got a happier power source and I think I'm more visible.
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post #3 of 4 Old 07-29-2019, 01:49 AM
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A lot of time, LED bulbs are rated not by consumption, but by their "incandescent equivalent". And 80w LED would be obscenely bright. A lot of people falsely equate watts with brightness. Ask average Joe and they have no idea what a lumen is, so they tend to go by watts, because that used to be a good indicator for brightness, even though it makes no sense.

Marketing absolutely knows how to take advantage of that. Add to the fact that Chinese stuff tends to inflate claims and Bam there you go.

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post #4 of 4 Old 07-29-2019, 02:30 AM
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When I measured a 25w LED globe it came out at 21w that's not far off.

The voltage you use to get the measurements & do the sums is very important.

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Last edited by Rolex; 07-29-2019 at 02:35 AM.
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