Spiderman wrote me in a PM (i posted this in one of his lighting threads) a response to my question about exaggerated lumen output claims.* Back in the day, stereo amplifiers were rated in rms watts. Since more power equals a more exciting product (mine is bigger than yours syndrome), mfrs began by boosting the watt output by calling it 'music power' then the instantaneous 'peak power'. Today, LED mfrs simply increase the lumen output in their ad copy. Spiderman told me to go by the watts consumed, and that this was a more reliable indicator of light output. Most of the headlight led's are cranking out 125 to 140 lumens per watt (or were last time I looked). Before you believe anything significantly higher, go to a website for light bulbs and check some LED's to see what kind of lumen/watt output one can expect. It is not likely that the headlight lamps can give you 175 lumens/watt when 1000bulbs.com shows most of its LED lamps averaging 115 - 125 lumens per watt (i'm making these numbers up as an example only, you will have to perform your own due diligence).
There are also a couple of reliable websites that test headlight LED's and report on the veracity of the mfr's claims.
And then there is Cindy at Evitek in China. I've received my new bulbs from her within 5 days and also around 2 weeks. Last time I ordered from them, H4 lamps (a pair of them) cost around $40 w/ shipping. I'm a repeat customer having bought Evitek lamps for my cars and bikes. She is cheaper than Amazon, but it seems we (STOC members) are into instant gratification over saving money. YMMV.
*After writing the above, I thrashed around in my saved conversations and found his quote to me, "lumens are not meaning full. It is the most misused data point in advertising. I look for real power data. That tells me more about the bulb."(sic)
He also pointed me to this website. Full disclosure, my PM to him is dated Nov 2021.