With projectors becoming smaller and brighter it is tempting to consider purchasing a 2000 ANSI lumen sub 3kg projector in the belief that this will be enough brightness to provide a good image. Whilst this is true, the mobile and ultraportable projectors were never designed to dissipate the heat build up from running for such long periods. You would be better to consider investing in a larger portable style projector which with its larger LCD panels and increased cooling capacity which will increase the projector's life and reduce the operating costs in lamps and service down time.