I doubt that the halogen high beams will generate enough heat to damage quality LEDs. I do have another caution for owners of 2015 LEAF SLs: I replaced the dome and cargo lights with Sylvania LEDs without incident. I then replaced the front parking light on the left with the same Sylvania LED that I used in the 2011 and it lit for about 10 seconds before blowing a 10-ampere fuse hidden in a power distribution module. There is no indication in the owner manual that there are fuses hidden in power distribution modules (one on each side under the hood on top of the front fenders). The lights are working again with the original bulb reinstalled and a new fuse. I still want to complete my LED conversion, but I need to get some spare fuses and do some more investigation as to cause before I replace the parking lights. I had no problems when I replaced the parking lights in the 2011 with the same Sylvania LEDs and I really liked the look without the yellow glow.
Update 2/21/2015: I tested the Sylvania LED with a separate 12-volt battery and confirmed it is not polarity sensitive and draws very little current. I then measured the voltage and visually inspected the socket and found no issues so I plugged the very same LED in that caused the blown fuse and it worked fine. I next replaced the parking light on the right with a Sylvania LED and tested it. It all worked fine so I now have nice white parking lights.
Last edited by GerryAZ
on Sat Feb 21, 2015 5:12 pm, edited 1 time in total.
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019