First of all, before you pick the lights, determine what mood you want to set... I would suggest intimate and romantic, with dim lighting.

You might want to consider installing a dimmer and having different lighting for breakfast, lunch and dinner.

When you install lighting make sure you also concentrate on the outside of the restaurant, as that is critical for perception and setting scene. 

Remember also to add emergency and safety lighting - that is required by law.

Most high-end restaurants I have gone into in the last year or so have had designer industrial-style pendant lights, which is great for creating little islands of intimacy from tables.

If it is a really high end restaurant, you might want to hang a grand chandelier in the middle of the room.

Ceiling fans are a great addition for restaurants, particularly for outdoor patios with ceilings.

Wall sconces - particularly unusual and ornate ones - create a really fine touch for restaurants.

I love track lights and spotlights in restaurants.

I would 100% keep away from oyster lights - I recently went to a restaurant that had them and it was terrible!

If you have a bar, then a row of warm white downlights above the bar looks fantastic.

Avoid pendant lights that do not have shades - they can cause glare and be very irritating to patrons.

If any of the food is on display then ensure you use lights and/or globes with a high CRI to ensure the colour is faithfully reproduced.