This is because you can later rent or purchase a more powerful laser for your existing projector. If your emphasis is on beam effects, spend more on the laser to get the maximum possible brightness. You want as much power as possible so beams show up even under adverse conditions, such as outdoor shows in high-brightness areas. A popular laser for beams is based on frequency-doubled YAG technology. YAGs are great for beams, but are poorly suited for graphics as they have larger diameters and usually are not continuous.
Warranties are available from reputable used laser dealers.
T he laser projector includes a pair of galvanometer scanners, a blanking or color system, and related electronics. You can either buy a fully assembled laser projector, or put together your own projector. Fully assembled projectors are usually made on a semi-custom basis. The manufacturer will design a system with components matched for your particular requirements. Adding beam tables and lumia effects quickly raises the cost.