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Quote from: Lobo on August 13, 2020, 10:52:02 PMSye... whilst power divided by volts indeed gives amps it’s not the full story when resistance is then bought into the equation. Your post fails to explain why lamps brighten as you increase the voltage - which you’ll know from 1st hand experience. The current (A) actually increases as you increase the voltage through the filament...the power rating of a lamp will be only be valid at the stated voltage . Anyways, please don’t take my word on it, but rather google the explanation.Yea, Deltarider, horses for courses. I’m gonna take a punt on the LED headlamp bulb, and will report back in due course. They annoyingly come in pairs... so if fail early I’ll have a spare 😂.Trig... you say you’ve got LED replacement ‘globes’.... how are they performing?I have had the cob type fitted to a 750 and a 550 for about a year or so and the 750 is just over a couple of thousand miles, since fitted with no problems. They are white light and not the yellow light you get from basic H4's. I bought a trade pack of them and they worked out around £3 per bulb. I am no expert when it comes to electrics and can't understand why some of them have a cooling fan (which will not fit in the headlight bowl) and the cob type don't. (Attachment Link) (Attachment Link)
Sye... whilst power divided by volts indeed gives amps it’s not the full story when resistance is then bought into the equation. Your post fails to explain why lamps brighten as you increase the voltage - which you’ll know from 1st hand experience. The current (A) actually increases as you increase the voltage through the filament...the power rating of a lamp will be only be valid at the stated voltage . Anyways, please don’t take my word on it, but rather google the explanation.Yea, Deltarider, horses for courses. I’m gonna take a punt on the LED headlamp bulb, and will report back in due course. They annoyingly come in pairs... so if fail early I’ll have a spare 😂.Trig... you say you’ve got LED replacement ‘globes’.... how are they performing?
Quote from: Trigger on August 14, 2020, 08:50:43 AMQuote from: Lobo on August 13, 2020, 10:52:02 PMSye... whilst power divided by volts indeed gives amps it’s not the full story when resistance is then bought into the equation. Your post fails to explain why lamps brighten as you increase the voltage - which you’ll know from 1st hand experience. The current (A) actually increases as you increase the voltage through the filament...the power rating of a lamp will be only be valid at the stated voltage . Anyways, please don’t take my word on it, but rather google the explanation.Yea, Deltarider, horses for courses. I’m gonna take a punt on the LED headlamp bulb, and will report back in due course. They annoyingly come in pairs... so if fail early I’ll have a spare 😂.Trig... you say you’ve got LED replacement ‘globes’.... how are they performing?I have had the cob type fitted to a 750 and a 550 for about a year or so and the 750 is just over a couple of thousand miles, since fitted with no problems. They are white light and not the yellow light you get from basic H4's. I bought a trade pack of them and they worked out around £3 per bulb. I am no expert when it comes to electrics and can't understand why some of them have a cooling fan (which will not fit in the headlight bowl) and the cob type don't. (Attachment Link) (Attachment Link) I bought some of these bulbs by following the link that trigger posted.... that particular item was sold out but i did manage to find an exact same item for something like £1.98 each iirc. So i bought 3. They were due to arrive in mid sept but actually turned up in about 3 or 4 days, so i fitted them yesterday and they work and look great. I put one in each of the yamaha’s but kept the third as a spare since it wont fit in the Honda as it is still running the original sealed beam type unit and i would need to buy a replacement shell to fit it... prefer to keep her original if i can.. But if and when it ever fails i will definitely go with the leds.. at 6 quid for 3 bulbs its a no-brainer!
At least here, in Slovakia and Czech republic LED bulbs are illegal as retrofit of H4 bulb. And I think that also as bulb retrofit into tail/stop light (21W/5W bulb) or flasher (21W) are illegal too.There is no LED replacement H4 bulb that is certified for road use to my knowledge (and will highly likely never be) due to its "beam" geometry, when in case of standard bulb source of light is very small piece of wire filament (kind of point source that is placed into specific place into headlight parabola to ensure defined beam geometry), while LED bulb uses multiple LEDs that emits light from other places compare to standard bulb and H4 parabolas are not designed for...Only legal solution is to replace whole headlight that is "E" certified for motorbike.
Quote from: Erny on August 31, 2020, 09:30:45 PMAt least here, in Slovakia and Czech republic LED bulbs are illegal as retrofit of H4 bulb. And I think that also as bulb retrofit into tail/stop light (21W/5W bulb) or flasher (21W) are illegal too.There is no LED replacement H4 bulb that is certified for road use to my knowledge (and will highly likely never be) due to its "beam" geometry, when in case of standard bulb source of light is very small piece of wire filament (kind of point source that is placed into specific place into headlight parabola to ensure defined beam geometry), while LED bulb uses multiple LEDs that emits light from other places compare to standard bulb and H4 parabolas are not designed for...Only legal solution is to replace whole headlight that is "E" certified for motorbike. Spot on, Erny! So far what buyers have 'seen'*, has not been confirmed by independent tests. What has been found however by the British AA, the German ADAC, the Dutch ANWB and the Austrian ÖAMTC, is that blinding headlights are the number one annoyance in todays traffic...* What others, including me, see, is mostly: choice-supportive bias or post-purchase rationalization.