Manufacturers publish rated hours per model and per picture mode, and that is the reference: check the official spec page for your projector rather than any figure I could give you here. Real life then varies with how you use it and where it lives, and that part is under your control.
What shortens light-source life, roughly in order of how often we see it:
Heat. Blocked vents, clogged filters, a projector shut in a shelf. Indian dust and Indian ambient temperatures make this the number one cause, and it applies to lamp and laser alike.
Abrupt power cuts on lamp models. A lamp that is switched off properly gets a cooling cycle from the fans; a lamp that loses mains at full temperature does not, and each such event shortens its life. If your supply cuts, a small UPS or inverter for the projector alone (see our answer on that) pays for itself.
Constant high-brightness mode when a lower one would do. In a dark room, eco mode gives the light source an easier life and quieter fans as a bonus.
Very frequent short on/off cycles on lamp units. Ten minutes on, off, on again is harder on a lamp than a three-hour film. Laser sources are much more relaxed about this.
What helps is the mirror image: clean filters on schedule, generous ventilation, eco modes for dark rooms, and letting shutdown cycles complete before pulling power.
Signs of an ageing lamp: gradual dimming (unnoticed until a new lamp shocks you), colour drifting toward yellow, and the lamp-hours counter in the menu approaching its rating. Lasers dim more gradually and rarely shift colour, which is a large part of their appeal.
Replacement lamps through authorised channels only. Counterfeit projector lamps are real in India, they are priced to tempt, and a fake lamp risks the projector, not just the picture: wrong power draw, poor housing fit, and in bad cases heat damage to the light engine. Not sure whether your projector needs a lamp or just a clean filter? Send us the model and the hours counter and we will tell you.
Not sure what fits your room and budget? Share your room size and budget on WhatsApp. It is a two-minute answer with a floor plan.
