Low emittance lattices for LEP

In 1997 LEP will enter its third phase and will be operated at energies well above 90 GeV. In order to reach the required luminosities at these higher energies, i.e., to reach the maximum beam-beam tune-shift parameter, an optics with a small horizontal emittance is desirable. Such a lattice must have a dynamic aperture sufficient to guarantee the beam life time. Several lattices with different phase advances per cell have been developed for this purpose and the reasons for these particular choices are explained. The relative merits of these different solutions as well as the experience gained both in dedicated experiments and in using these lattices in regular operation during 1996 are discussed