Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: I have a Surefire Z2 LED Combatlight which needs a new bulb.  I bought this item but can't figure out how to get the old bulb out.  Help?
Document: This was bought for a replacement to the Surefire Z2 COMBATLIGHT. I was hesitant since a friend of mine had bought a similar item a few years ago and it burnt out due to the rechargeable batteries we are using. I use this flashlight on a daily basis and needed a good replacement bulb. The factory xenon bulbs can be expensive and are harder to find. Surefire is wanting you to spend the $80+ to upgrade to their LED head. After the item arrived I actually read the instructions.
I bought this LED to upgrade an older surefire light. The aluminum base for this LED was too thick and it would not fit all the way into my surefire. Being the handyman I am, I took the new aluminum base to a grinder and smoothed with sandpaper for a good fit. The bulb is MUCH brighter than the 65 lumens that originally came on my surefire. For the price I would give this 5 stars IF I didn't have to grind and sand to get to fit my surefire.
The bulb is very bright made my old one look like a candle. The only thing wrong is that the new bulb is just a little longer than the old one and there is a slight gap between the lens cap and the main flashlight. If you can live with that small gap the bulb if for you and for the price you can't get hurt too bad.
This is an awesome bulb at a great price! I have had this bulb in my surefire m951 for a while now and it has taken quite a beating and kept on ticking so to speak.You do have to do a little tweaking to get this to fit properly, but follow the recommendations given and it will work fine. I have had the same bulb in a Surefire Z2 combatlight for about 5 years now and it is still going strong.
I bought the LED Upgrade - 450+ lumens - CREE R5 Single Mode Drop-in - P60 to install in my old incandescent Surefire Combat light. The good news is that it not only works but it works just great. This drop in unit gave new life to a faithful old friend and I love it! The quality is excellent, the beam is clean and symmetrical and the range is outstanding.
This bulb was a perfect fit for my Surefire Z2 and a much better value than the much more expensive Surefire LED retrofit option. After reading the instructions I popped the outside large spring off of the new bulb so that it fit properly in the Z2. The color temperature is cool (bluish) white.
I replaced the original lamp with this new LED upgrade. It was necessary to remove the large outer spring to get the item to light properly. Very pleased with the light output and was able to continue the intermittent and hands free on features with the upgrade. Would buy again. Battery life has improved too.
If you have an older Surefire that needs a new bulb buy this, don't waste  money buying the same Surefire bulb over and over. Don't over pay for Surefire's LED conversion either. This bulb is brighter than the standard bulb, as well as the LED bulb Surefire used to sell. These will be going into all of my Surefire lights when it comes time to replace bulbs.
i bought this to update the weak incandescent light from my Surefire 6P, which is otherwise still going strong. I was tired of my other lights beating it...even cheap costco multipak LED flashlights! It took a long, long time for the item to arrive, but it finally came today. It took all of 30 seconds to switch the bulb and wow...what a difference. light is clear, bright, and the cone is very even, without dead zones.
This upgrade has brought new life to my ancient and outdated Surefire C2 light. I took 1 star off as to the bulb driver (circuit that powers the LED) allows way too high of amp draw, causing my CR123 cells to go into thermal shutdown after about 3-5 minutes of sustained use. I can't fit a 18650 into the C2 body or I would test that out, but I imagine it would be similar performance.
Answer: yes