To add a second light which is switched with the first one, the switched line, neutral and earth need to be extended to the second light. This diagram shows the additional cable connected to an existing ceiling rose. The new cable here. To add a second light which is switched with the first one, the switched line, neutral and earth need to be extended to the second light. This diagram shows the additional cable connected to an existing ceiling rose. The new cable here is labelled 'light 2'. The other end of this cable is taken to the position of the new light. Loop is not required. Connections at the new light fitting are just line, neutral and earth. There is no connection to Loop. This light will only have power when the first light is switched on, and therefore will work in the same way as the first one. This concept can be used with ceiling roses as shown here, but the same principles apply to other light fittings includi. If three, four or even more lights are required to be switched from a single source, the new cable can be extended to as many lights as required. Here the ceiling rose is shown with two cables, both of which connect to line, neutral and earth with no loop connection. One cable connects to the previous light, the other continues to the next light. N.