Replacement lamp for BenQ projectors, tested and validated for models ML7437, MS619ST, MS630ST, MW632ST, MX620ST, MX631ST. - Performance and reliability: All bulbs are tested before shipment to ensure dependable operation. - Customer support and return: Responsive return/exchange service with feedback within 12 hours. - Safe and simple installation: Easy to install like removing the old lamp. Power off the projector before installation, unplug, and ensure the connector is firmly seated. No electrical work required beyond handling the projector. - Compatibility note: If the new bulb does not work, it may be due to production parameter mismatch. Our engineers continuously collect data and test to improve compatibility across devices. Practical use scenarios: - Office or classroom presentations using the listed BenQ models. - Home theater setups requiring reliable BenQ projector illumination. - Spare lamp replacement in maintenance routines to minimize downtime.