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LED lighting is such a game changer for both low voltage and line voltage installations. A bit of History: With LV wiring using old style incandescent bulbs at 12 volts required careful sizing and layout of wiring. Voltage drop was a huge consideration. Even an 18 watt bulb at 12 volts would draw 1.5 amps.
0. Water intrusion - LED "bulbs" are typically complex assemblies with joints, as opposed to the glass envelope of an incandescent floodlight. Add water, add freeze-thaw cycles, and perhaps a manufacturing flaw on one bulb, water gets where it should not, things don't work so well. Simple component failure is the other likely option.
3. (1) Incandescent bulbs don't care whether the power source is 12VAC or 12 VDC. What kind of bulbs to you have? (2) The advantage of AC over DC does not apply to this situation, in which runs are quite short and no step-up/step-down is being used. (3) Some supplies require a load to be meaningfully measured. – Phil Freedenberg.
A sticker on the fixture says that it is Max 75W. The other day, the 14W / 60W equivalent CFL that was in it since I moved in burned out and I had to replace it. Since it is my only source of light in the room and it is 2015, I bought a 13W / 75W equivalent LED bulb to go in it, the highest I could find at the local hardware store. No problem ...
The motion detector monitors ambient light (daylight) and then activates when it's dark enough, and motion is detected. If you turn the switch off and on within a second or so, the light will stay on, and this overrides motion detection. To go back to normal operation, turn the switch off and wait ~10 seconds, then turn back on.
1. I bet your particular bulbs are not labeled for fully enclosed fixtures, which is typical of outdoor fixtures. Your bulb repeatedly overheats until the main capacitor dries/pops, at which point the bulb can no longer boot up the DC power supply that feeds the actual LED; it won't "turn over" once that happens and the bulb needs replaced. Use ...
Oct 28, 2018 at 0:46. 2. @blacksmith37 Home freezers are typically 0 F = -18 C, which is > -25 C (i.e., within stated range). -40 C is a lot colder. – manassehkatz-Moving 2 Codidact. Oct 28, 2018 at 1:08. 1. As a general rule, many types of electronic components are designed to actually work across a wide range of temperatures and other ...
Get LED bulbs that are approved for enclosed fixtures, e.g. many of the newer Cree and Philips bulbs. They will say on the packaging. Replace the fixture entirely with a LED fixture that doesn't have bulbs at all. E.g. this similar fixture from Home Depot. Use a CFL or old-fashioned incandescent bulb in that location and put the LEDs elsewhere.
OTOH, using the 14 on it's own isn't really dangerous over 20' of lighting-level load, and if you're using LED lights, you likely won't notice the minor voltage drop on lights 20' away from the others. If your system is AC, check your local regulations or just get more 12AWG.
Keep in mind high-pressure-sodium is extremely efficient, so a 70 watt LED will probably not be quite as bright. However, if the LED is aimed (largely one-directional, e.g. down), the LED will be much more efficient because it is aimed where desired, and not trying to light up inefficient reflectors. (those dreadful "corn cob" lamps are not ...