It was actually used in many old systems as it was much easier to create a 12vac transformer compared to a dc transformer and incandescent bulbs could care less about ac or dc power.
Low voltage landscape lighting transformer ac or dc.
The ac skin effect is almost negligible at 60 hz so voltage drop along small conductors should be the same for ac or dc and depends on current and the conductor loop resistance.
No low voltage ac lighting is not just used in landscape lighting to try and spite all those switching to leds.
For pricing and availability.
Once your landscape lighting design is complete you can figure out what size of low voltage transformer you need.
There are incadescent lamps made for dc voltage such as landscape lighting and for the marine industry.
Transformers generally range from 150 to 900 watt capacity.
Low voltage outdoor lighting transformers in single dual and multi tap in black or stainless steel in voltages from 12v to 22v and inputs from 120 to 277 volts.
100 of 14 awg copper 20 c gives you 260 milliohms of resistance and at 1 a would drop about 1 4th volt.
Hampton bay low voltage 120 watt landscape transformer this landscape transformer is designed for 12 and 15 voltage led lights.
Portfolio 7 watt specialty textured bronze low voltage led path light.
12 2 black stranded cu low voltage landscape lighting wire 81 01 hampton bay 4 5 watt millennium black adjustable light color outdoor integrated led landscape flood light 4 pack.
It may be you are underpowered as low voltage systems are very sensitive to voltage drop on long runs.
Low voltage landscape lighting is mostly 12vac but there are low voltage dc systems.
Offered for standard applications or led lighting systems in ac or dc.
Dewenwils 60w outdoor low voltage transformer with timer and photocell light sensor 120v ac to 12v dc weatherproof specially for led landscape lighting spotlight pathway light etl listed 475 price 69.