On 12/05/2016 02:22 PM, Tekkie® wrote:

[snip]

Sine they are diodes they are parallel wired, no sectional problems causes
by the LED.


They are in series of about 30. Longer strings have multiple series in
parallel.

A diode maintains a low voltage across itself (with forward polarity,
which an LED needs to light) or at most a few volts. The circuit needs
some means of limiting current to prevent the LEDs from destroying
themselves. This is usually a resistor. It wastes a lot more current
dropping 120V to 3V (single LED) than dropping it to 90V (LED series).

You CAN put LEDs in parallel (if they have the same forward voltage),
but that doesn't solve the wasted power problem.

BTW, I do have a couple of light sets that use LEDs in parallel. This is
a solar-powered set that uses 20 LEDs and a single LiFePO battery (3.2V)
not 120V.

--
19 days until the winter celebration (Sunday December 25, 2016 12:00:00
AM for 1 day).

Mark Lloyd
http://notstupid.us/

"People used to think that to mix religion with business spoiled the
religion, now they think it spoils the business." [Lemuel K. Washburn,
_Is The Bible Worth Reading And Other Essays_, 1911]