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The 168 bulb is a brighter bulb because it is a higher wattage bulb than the 194. Both are the exact same size. You'll see all aftermarket bulbs on web sites show 194/168 wedge or some similar type.
Similarly, it is asked, what is the difference between a 161 bulb and a 194 bulb?
Yeah, the only difference between the two are wattage. It's only a few watts, though, like 2 or 3 watts. Most hyper-whites are 194's.
Similarly, you may ask, what's the difference between 193 and 194 bulbs?
While the 194 can last up to 15,000 hours of use, it has a length of 1.06 inches and a diameter. 0.56 inches, the amperage is lower than the 193, being at 0.27 Amps, while the voltage is of 14 volts and the glass bulb itself is a T3. 25 Bulb. Compared to the 193, it takes less Watts, being at 3.8 Watts.
Yes, one will be brighter. The 194 is 2 candlepower and the 168 is 3 candlepower.