New light bulb for 2015 Bonneville T100 Black - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 12 (permalink) Old 09-18-2019, 07:06 PM Thread Starter
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New light bulb for 2015 Bonneville T100 Black

Folks, please give me best recommendation on new headlight bulb. That’s right. I am trying to upgrade the stock bulb without breaking my bank acct. Thanks in advance, Matt
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post #2 of 12 (permalink) Old 09-19-2019, 03:02 AM
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lots of options here and most will say to go LED

but to keep it cheap and simple an Osram H4 100/90W Super Bright bulb works well.
https://www.osram.com/ecat/SUPER%20B...t/ZMP_1066359/

the main problem with the stock light being dim though lies with the thin wiring going through a switch then to the headlight. this creates a voltage drop that equates to a great loss of candle power or brightness in the bulb

to overcome either a LED bulb or use relays like the Eastern Beever relay kit which works wonders

then there is the issue with the cheap and crappy plastic headlamp itself of which there are several threads regarding an upgrade to Hella or Cibie
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2007 Tuxedo T100.
Dom Tourers, TTP breathe, DNA filter,baffle gone, 40/140/1 shim 3 turns, TTP igniter tune, Hagon Nitros, Thruxton Bars, Halcyon bar end mirrors, Pingel fuel valve, Monza gas cap, Burton seat, Avon Roadriders
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post #3 of 12 (permalink) Old 09-19-2019, 09:47 AM
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What Bonza said. Get an Eastern Beaver or other relay kit, or do it yourself to keep cost down, you need two relays and associated bits. It's the best single improvement you can make to the headlight. Your existing bulb will be brighter, although it won't last as long.

It will also preserve your ignition switch, which can't handle the current very well.
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post #4 of 12 (permalink) Old 09-19-2019, 05:07 PM Thread Starter
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Smile LED as first option

Thank you all for the two options on the light improvement.
I'll try an LED and see if the relay kit is needed.
Cheers!
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post #5 of 12 (permalink) Old 09-19-2019, 07:20 PM
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Still not convinced LED is way to go after installing Eastern Beaver relay to address the poor low gauge wiring, a major limiting factor on the stock later air cooled Triumphs . Ended up going back to an H4/9003 Sylvania after some research and call outs on this forum. Their brightest option (orange pack) is working well for me at $25 each or $45 for two.

Will see how long this one lasts? I've read the higher lumen H4/9003 bulbs have a limited life expectancy due to the extra heat as compared to the regular versions.
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post #6 of 12 (permalink) Old 09-20-2019, 08:19 AM Thread Starter
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I've also read some reviews warning the shortened life expectancy with those higher lumen bulbs. Ordered an LED bulb and will see how it does. Thanks for your thoughts.
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post #7 of 12 (permalink) Old 09-20-2019, 01:42 PM
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I just installed one of these yesterday and it's a noticeable improvement over stock. Given the universal comments that the lifespan is awful and considering how much night riding I do, I also ordered one of these LEDs which arrives today:

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Once I install tomorrow I will report back on the improvement over the Sylvania H4 9003!
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post #8 of 12 (permalink) Old 09-20-2019, 05:22 PM
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Quote:
Originally Posted by theblackhand View Post
I just installed one of these yesterday and it's a noticeable improvement over stock. Given the universal comments that the lifespan is awful and considering how much night riding I do, I also ordered one of these LEDs which arrives today:

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Once I install tomorrow I will report back on the improvement over the Sylvania H4 9003!
The only thing missing in that linked listing is the brightness of the bulbs, in lumens. This is the most important number to know when considering a replacement headlight bulb. The brightness of LED H4 replacements ranges widely. The listing says "up to 200% more brilliant brightness," which means nothing.
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Marty
2005 Bonneville Blue 790cc, AI removed, Staintunes RC, no snorkel, inlet enlarged, 118/40/NBZT needles/1 shim/3 turns, Ikon 7610s, Ricor Intiminators, Barnett green clutch springs, Michelin Pilot Activs, D9 gauge panel, tachometer.
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post #9 of 12 (permalink) Old 09-20-2019, 05:25 PM
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6500k is the brightness. It's there if you look at the pictures on the side of the display. I just mounted it and even in daytime it is radically brighter. Will test it out at night over the weekend and report back.
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post #10 of 12 (permalink) Old 09-20-2019, 05:29 PM
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One thing I should mention is that the width of the base of the LED prevents you from using the standard retainer clip for the bulb. This is because it putts the whole LED assembly and fan in the front instead of in the back of the bulb like most other ones. It seems to fit very snug it the hole and the rubber boot on the back should prevent it from getting pushed out but just wanted to let everyone know about this quirk.
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