This is great feedback, and I have updated the information on the original post to reflect the questions raised on this thread. Click here to see the updated DIY
But with all due respect to the readers of this thread, it is necessary that the person attempting this DIY have a certain amount of basic knowledge to be successful with this DIY mod, primarily knowing how to remove and replace an automobile headlight bulb, and knowing what the headlight configuration of your LEAF is. Without these two pieces of basic information, then it is probably best to avoid attempting this DIY.
The headlight configurations of the 2011-2015 LEAF are:
2011-2015 LEAF SL: LED low beams, H9 halogen high beams
2011-2012 LEAF SV: LED low beams, H9 halogen high beams
2013-2015 LEAF SV: H13 Halogen low/high beams
2013-2015 LEAF SV w/LED Headlights and Quick Charge Port Package: LED low beams, H9 halogen high beams
2013-2015 LEAF S: H13 Halogen low/high beams
All headlight bulbs have alignment tabs which must be properly aligned with the headlight housing to properly mount the bulb. For H9 & H13 bulbs there are 3 tabs with the center tab being longer that the two other tabs. The bulb can only properly be inserted in one orientation and then twisted to lock it in place. The orientation (in relation to vertical) for the left and right headlights is intentionally not the same.