[header] How to daisy chain lights [title] Find out the maximum wattage your recessed light fixtures can individually consume. [step] This may differ from the wattage of the light bulb in the fixture. [substeps] If you are not sure of the fixture maximum wattage, use 100 watts per fixture as an estimate. 
[title] Determine whether the total wattage of new and existing lights will overload their shared circuit. [step] If using a dimmer switch to control your lights, for example, most of these switches can handle up to 600 watts.