I noticed a landing light is now out after my last training flight. A couple of questions: NOTE: Not switching to LED yet. I'd rather put the $$$ towards more flight instruction. Questions: 1.) Do I need the 4509 lamp? I have a copy of the Service Manual and can not find any specified part number in Chapters 1, 2 or 15. 2.) Is the taxi light the same as the landing light? In Chapter 15 they're each just labeled lamp. I always thought the taxi light was a wider angle beam but perhaps it is just aimed down more? 3.) Some of the 4509's are halogen or is it quartz? Should I order one of those instead, the price difference isn't that much? 4.) Its looks like I need to pull the lower cowling to do this replacement? Is there a way to do it without pulling the lower cowling? 5.) Is a PAR36 the same as the 4509? Thanks for any help. I was hoping to get the right info and order the lamps without pulling the lower cowling just to see a part number, then put it back on so I can do lessons and then pull it again to replace them.