Hi @TinyDiver
As Matt mentioned, it is possible and fine to daisy chain more lights together. The only limitation that will eventually be hit is the amount current going through the wires. That depends on the voltage you run the lights at.
For example, at maximum power they always consume about 15 Watts, so at 12V, that’s 15W/12V = 1.25 amps per light. So, which six lights you’d have up to 6 x 1.25 = 7.5 amps running through the wires. That’s about the normal rating for the 22 AWG wires to handle long term.
Note however, that if you run the lights at higher voltage, such as the maximum voltage of 48V, the then current is much lower. In that case, 15W/48V = 0.31A each, which means you could run up to 24 lights in series before you’d get the same 7.5A current in the wires.
Sorry if this is too much info! You should definitely be fine with six.
-Rusty