Power
Where each run needs fresh power, how to count feeds, and how the tee goes in.
Every 75 lights: a new channel or a power injection
Past about 75 lights (about 50 ft, or 15 tracks) the far end dims and whites drift warm. So the run gets fresh power one of two ways.
Option A · Start a new channel
Run a 25′ 3-conductor section from where the next section starts back to the next controller channel. Best where the roofline breaks anyway; it makes a natural zone.
Option B · Power injection
Twist a tee between lights 75 and 76. A 25′ 2-conductor section runs from its 2-pin end, up its own 5/8″ hole, to a controller power output. Data carries straight on.
Count the feeds
Lights ÷ 75, rounded up, is the number of power feeds. The channel is the first; the rest are tees or new channels.
1–75: one channel · 76–150: one more feed · 151–225: two more · 226–300: three more.
Lighting calculator — enter each section and it marks every tee and channel.
The tee only fits one way
Female 3-pin (right) takes light 76; male 3-pin and male 2-pin (left) point toward the controller, into light 75 and the power wire. It lands on a string joint — no cutting.
A tee doesn’t change the count
A tee adds power, not a channel: 150 lights with one tee is still 150 lights on channel 1 in the app.
Worked example: the 100 ft kit. 155 lights is three feeds: channel 1 with tees at lights 76 and 151, or start channel 2 at a corner instead of the second tee. The kit ships four tees and four 25′ 2-conductor sections, so either layout works.