Originally Posted by
Ironfish653
Wow, a Nightsun? Those things are OLD.
I know, I have one. The 30w rating was with both beams on, and IIRC, the battery lasted ~45 minutes on HI. That battery pack was also a low-output NiCad setup, that weighed about 3 lbs and took up a water bottle cage.
Oh, you had the DELUXE version.
I got the Lead Acid model. The battery weighed at least 5 pounds.
I used to commute at least an hour or so with it without problems. But, it was beastly heavy.
I looked at the company a couple of years ago, and it appeared as if they never upgraded, and were still using incandescent bulbs. I have no idea why they hadn't adopted LEDs.
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For the OP:
Go with LED. Then you will use a lot lower watts than the car incandescent bulbs.
However, I'm not sure your goal should be the same power as a car. Yes, that sounds good, but one issue is that many bike bulbs are less than 1" in diameter. Auto bulbs have a reflector of say 6" or larger.
So, if you want reflected light, it must be bright. But, for looking directly at the bulb, I think the tiny bulb looks much brighter. Thus, you really need dimming to avoid blinding oncoming traffic.
I tend to just tip my light down, and back up.
Some of the lights do have a shaped beam, but those are only the most expensive lights.
For example, the Specialized Flux Expert.
https://www.specialized.com/ca/en/fl...light/p/132989
Unfortunately, they are not cheap.
Likewise with bike taillights. There are some really bright daylight taillights. And, they are good in the daylight.
However, what you do not want to do is blind someone coming up from behind you.
Lately I've started using an older Fly6 on the rear. Camera + pretty descent taillight. A few brightness modes. I usually turn it down a bit after dark.