While I drive mostly in the city and freeways, I used to use my fog lights 100% of the time for the extra brightness on my '99. The DRL hack using the LED's does change things. The LED bulbs are not focused/aimed as such and broadcast over a much wider area including up. Thus I don't get the same concentrated light down near the road as I did with the regular fog lights. I don't know if the total lumens are the same or close -- might be. But certainly not as focused. But I do like the idea of being seen better in the daytime, so I guess the trade off was okay for me.
Someday maybe I'll upgrade top the Xenon like I had on my BMW's. Really got spoiled with those, so going back to halogens on my newly-aquired Boxster has been a bit of a throwback.
The LED's I used from Amazon:
https://www.amazon.com/gp/product/B00SZK2HQC/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1