This universal lamp is a replacement lamp for the projector that is compatible with the original factory lamp. General purpose lamp replacement projector lamp for domestic and overseas models and can be reused for commercial use. The service life and brightness of the bulb are almost the same as the original product, but the life of the bulb is similar to the original product, there may be individual differences depending on the type of lamp and usage environment. CBH type performance is around 70-80% of OBH The initial failure replacement period is only 7 days from the delivery date. Warranty time is 90 days from the delivery date CBH and 120 days OBH Replacement filters not included. Appearance and texture may vary depending on the model used. The projector uses a high pressure mercury lamp with high internal pressure. Due to its nature of this lamp, it may burst or become unlit due to loud noise due to impacts and over use. Please note that the time from bursting or non-light will vary greatly depending on the individual lamp and usage conditions, so we recommend having a replacement lamp in advance. OBH has original bulb + housing. (Finished) CBH comes with OEM bulb + housing. (Finished Product)