[jamesqf]

I want to replace the marker & tail lights on my Toyota pickup with LEDs, but I can't find anything that gives the appropriate lumens to use. The marker lights, for instance, are Type 194, but the SuperBrightLED website has versions from about 5 to 150 lumens. How can I find out what the proper values are?

I would have thought this would have been some sort of industry or government standard, but all my searching just comes up with retailers, anecdotes from people who've switched (without lumen info), or people asking the same question and not getting answers.