Unfortunately the very best LCD monitors currently all take pretty long to start up.
The Asus PG27UQ (regarded as the current-best consumer 27" 4K LCD) takes almost 20 seconds to start up, presumably to initialize a bunch of state for its FPGA.
No, you don’t. Unless you are using an OLED screen, you have an LED-backlit LCD screen. Vendors call them LED monitors because it sounds more high tech than old LCD monitors.