12.5 Volt Battery To 11 Volt LED Fixture
Brand new 28 watt fixture given to me free. Originally 120 VAC. Stripped the regulator out for pure DC operation, emergency lighting off a smaller car jar battery. I am going to power it off the batte...
Forum Discussion
Yes there was an 11 volt brick. Using the inverter is/was absurd. Turns a 2.1 ampere battery draw into a 5.2 ampere battery draw, plus lots of fan noise, AND a less than brilliant output as compared to incoming line shore power AND a lot more heat buildup in the brick. Yeah a PSW inverter would be better but the issue may be such a low wattage operation puts the inverter into the drunken sailor efficiency range.
When I first started using LEDS for indicator lamps they were rather unforgiving of overcurrent operation. Looks like the newer breed is more tolerant and dropping the supply voltage to the 11 and change range will do the job. The setup is to allow for a high intensity reading lamp type output so I don't kill myself with the wrong medication in the middle of a power outage at night. Freakin Mexican meds usually have no pill markings and are blister packed on foil with font so tiny and distorted that 3X reading glasses and a strong light is necessary to help my weak eyes*. I am going to ferret out a bad gooseneck lamp base and adapt the lamp to the gooseneck. I'll get a glass shop to cut out a circular clear lens. Holding the frosted lens up to a light bulb the lens casts a pretty dark shadow onto the concrete floor.
*The climate does not allow me to pre-strip the meds from the blister pack. The humidity would turn them to mush inside a week.
When I first started using LEDS for indicator lamps they were rather unforgiving of overcurrent operation. Looks like the newer breed is more tolerant and dropping the supply voltage to the 11 and change range will do the job. The setup is to allow for a high intensity reading lamp type output so I don't kill myself with the wrong medication in the middle of a power outage at night. Freakin Mexican meds usually have no pill markings and are blister packed on foil with font so tiny and distorted that 3X reading glasses and a strong light is necessary to help my weak eyes*. I am going to ferret out a bad gooseneck lamp base and adapt the lamp to the gooseneck. I'll get a glass shop to cut out a circular clear lens. Holding the frosted lens up to a light bulb the lens casts a pretty dark shadow onto the concrete floor.
*The climate does not allow me to pre-strip the meds from the blister pack. The humidity would turn them to mush inside a week.
