Why can you choose to trust us? Because Zmstlamp is pursuing higher-quality projection lamps, it adopts a new generation of upgraded A+ wicks and is equipped with high-performance matrix light control, which greatly extends the actual service life and increases the brightness to 90%, which is brighter than other ordinary projection lamps on the market. The service life is longer, and each product will undergo rigorous calibration and testing before it is sent out, which can achieve the best output of brightness and color. The high quality of the product is guaranteed, so you have no worries about your choice. When to replace the projection lamp: When the indicator light on the projector panel starts to flash orange, or the projected image is darker and blurry than before. When the projector is turned on, a message to replace the lamp appears on the image. In order to get a better projection effect, it is recommended that you replace the projection lamp.How to replace the projector bulb: 1. Turn off the projector and unplug the power cord. 2. Allow the projector lamp to cool down sufficiently. 3. Use a screwdriver to remove the screws on the cover, slide the lamp cover, and loosen the two screws that fix the bulb. 4. Pinch the lamp holder and pull it straight out. 5. Operate the steps in reverse order. Install the purchased Zmstlamp lamp back into the projector and tighten the screws. 6. Install the lamp cover and reset the lamp usage time.Matters needing attention: 1. To avoid burns, the projector needs to cool down for at least 60 minutes before replacing the projector lamp. 2. You can consult us if you have any questions, and we will do everything we can to satisfy you, provide you with a 180-day warranty and a 30-day money-back guarantee, without any conditional feedback within 12 hours, so that you have no worries about your choice.