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Upgrade - NiteRider Trail-Rat 2.0 Halogen to LED

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Upgrade - NiteRider Trail-Rat 2.0 Halogen to LED

Old 06-02-19, 04:26 PM
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JerseyShoreRide
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Upgrade - NiteRider Trail-Rat 2.0 Halogen to LED

I have gotten good service from the NiteRider Trail-Rat 2.0 bike head light but the reality is that a 10W filament bulb draws too much power and the charge time is way too long.

So I decided to replace the 10W Halogen NR11 and I did my research. I obtained a Satco 3W LED MR11 (5000K). This is a 12V 3W LED and it is an almost perfect fit in the head light housing. The only problem was the twin leads were slightly too long. I used a Dremel to shorten the leads and it was good to go.

I tried it using the stock 6v NiMH battery pack and it worked great. Using a DMM, I was able to demonstrate that it used ~1.2W. I found no detriment from using this 12v LED on the NiMH 6v battery ( measured 6.35V ).

Last edited by JerseyShoreRide; 06-03-19 at 05:57 AM.
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Old 06-03-19, 09:12 AM
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All white LEDs run on approximately 2.7V so the bulb has electronics built into it to keep the voltage delivered to the LED to at or below 2.7V. That's why it will still work on half of the rated voltage for the bulb itself. I wonder if there is any effect on the lumen output. You could power it with 12V DC from any 12V converter like the ones used for electronics equipment. The differences I see for this bulb and a halogen bulb is the current, the CRI, and the lumen output.
12W versus 3 for the LED, CRI 100 for halogen, 80 for LED, and 125 lumens for 10W halogen and 210 for 3W LED
https://www.lumens.com/10w-12v-mr11-...e-uu14008.html and SATCO S9283

That's still a pretty low output for a modern LED bike light. Once the battery dies it may be toast too as Niterider no longer seems to support the NiMH batteries having moved on to Li-ion.
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Old 06-03-19, 10:11 AM
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I hooked up a SLA 12v battery and I could not readily see much of a light emission difference. Offhand I can't come up with a simple quantitative analysis. Maybe some optical input device placed at a given distance from the bulb face measuring the voltage generated for applying 6v vs. 12v to the SATCO LED.

Originally Posted by VegasTriker View Post
That's still a pretty low output for a modern LED bike light. Once the battery dies it may be toast too as Niterider no longer seems to support the NiMH batteries having moved on to Li-ion.
I wouldn't call the output "low" at all. The term "low output" would be a misrepresentation. The 5000 Deg Kelvin light of the LED vs the 2700 Deg Kelvin light of Halogen is much more noticeable on reflective surfaces as well emanating a consistent distribution of light across the beam width. The objective of seeing and being seen is met. It is not my intention in blinding drivers of other vehicles and/or pedestrians. I have taken it off-road at night and the light output is quite sufficient. The difference from Halogen to 5K Deg K LED is a quite a step-up. Best of all the LED is a COTS product.

The battery is just a pack of 1.2vdc cells and it can be replaced with NiMH 1.2v 2.5aH AA sized batteries. 2 in parallel and 5 pairs in series will yield 5.0aH @ 6v. The stock charger took 9+hrs to charge so I had already replaced it with a 7.5vdc @ 1amp transformer and I cut down the charge time tremendously. Since the SATCO LED is rated at 12v I actually can use a range of batteries from 6 v ~ 12v using NiMH, Li-ION to SLA. Because I have now limited the power consumption from 10W to 1.2W the amount of on-battery time is greatly extended thus the need for a 4.0aH battery pack is lessened allowing just 5 NiMH 1.2v 2.5aH AA sized batteries in series could be used to replace it and it would still have an increased on-battery time vs. the 10W halogen.

I see this as a win-win outcome.

Last edited by JerseyShoreRide; 06-03-19 at 03:51 PM.
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