Determine minimum transformers required

Figure out how many transformers you'll need by multiplying the total fixtures by the max watts used by each fixture

Max watts to plan per fixture (assumes max lumen setting)

Fixture	Max watts
Dogwood deck	1W
Almond flex	2W or 5W
MR16 lamp	3W or 5W
Bonsai path Bonsai marker Bonsai area Bonsai mini wash Bonsai hardscape	6W
Lotus path Pine path Pine mini path	7W
Palmetto well Palmetto area	10W
Aspen accent IR	10W
Azalea wash IR Redwood accent IR	15W
Bonsai accent	20W (30W if saturation <100%)

Determine minimum number of lines (runs) required per transformer and common

Figure out how many lines you'll need and which tap to put each line on by determining voltage drop and max fixtures per line.

Use the below table as a general guideline. It assumes 12/2 wire is used. Using a smaller gauge will result in higher voltage drop.

Fixture	Short run <50'	Medium run 50-100'	Long run 101-200'	Extra long run >200'
Dogwood deck	15	15	15	*Calc
Almond flex \| 2W	12	12	12	*Calc
Almond flex \| 5W	10	10	10	*Calc
MR16 lamp \| 3W	12	12	12	*Calc
MR16 lamp \| 5W	10	10	10	*Calc
Bonsai path Bonsai marker Bonsai area Bonsai mini wash Bonsai hardscape	10	10	10	*Calc
Lotus path Pine path Pine mini path	10	10	10	*Calc
Palmetto well Palmetto area	9	7	5	*Calc
Aspen accent IR	9	7	5	*Calc
Azalea wash IR Redwood accent IR	6	5	4	*Calc
Bonsai accent	6	5	4	*Calc

*Calc - Voltage calculation required for extra long runs

In our example, if the locations of the fixtures require the below run lengths based upon the fixture and transformer locations:

We would have 5 runs:

Run #1 5 Bonsai accent @ 60' on 15V tap (100W)

Run #2 5 Aspen accent @ 75' on 15V tap (50W)

Run #3 4 Aspen accent @ 150' on 15V tap (40W)

Run #4 3 Palmetto area @ 80' on 15V tap (30W)

Run #5 2 Palmetto area + 8 Dogwood deck @ 40' on 14V tap (28W)

And for the two 150W commons:

Common 1 Run #1 + Run #5 (128W, 15% capacity remaining)

Common 2 Run #2 + #3 + #4 (120W, 20% capacity remaining)

In this example if our 300W transformer had only 1 common all 5 runs would run though it without issue.

Fixture | Pine path