With power LED's mounted boards with adequate copper surface or aluminum surface area (~1 sq.in/Watt) cool emission of light can be adapted to almost any fixture with mindful avoidance of glare.
I put these together one day for Winter Seasonal exterior lighting using surplus boards cut down to a 4S string and soldered with AWG 30 and soldered to a stringer of six (6) lamps using AWG 18 speaker wire with a length of 7 meters.
I had a surplus 12V SMPS 2.5A brick and it was plugged into a small extension cord hardwired into an outside garage light fixture (disabled bulb) and mounted using plastic wire staple clips with drywall screws _|````|_ to aluminum soffit under the roof edge.
No current limiting resistors were required since the Voltage was 12.0V and this equated to approx 200~300mA per luminaire and since I knew these LEDs were high quality low ESR the voltage is well matched getting 3.0V per LED. I didn't worry about the exact current as they ran cool and I wasn't looking for a big spot light or torch level brightness.
The brick I had was regulated, but if it was unregulated (~13V with this ~50% load), it would have been too bright and then I might have added a suitable power diode in series to drop the brightness with 1V.
The paper Chinese lanterns were purchased at the Dollar Store ($1) and painted with clear exterior Urethane.. The LEDs were free surplus ( my luck) and adhered to clear strips of scrap polycarbonate plastic bent into a bracket for fastening into the bottom ring with short self-tapping screws. A spring metal wire stretches the lantern from top to bottom.
I put these together one day for Winter Seasonal exterior lighting using surplus boards cut down to a 4S string and soldered with AWG 30 and soldered to a stringer of six (6) lamps using AWG 18 speaker wire with a length of 7 meters.
I had a surplus 12V SMPS 2.5A brick and it was plugged into a small extension cord hardwired into an outside garage light fixture (disabled bulb) and mounted using plastic wire staple clips with drywall screws _|````|_ to aluminum soffit under the roof edge.
No current limiting resistors were required since the Voltage was 12.0V and this equated to approx 200~300mA per luminaire and since I knew these LEDs were high quality low ESR the voltage is well matched getting 3.0V per LED. I didn't worry about the exact current as they ran cool and I wasn't looking for a big spot light or torch level brightness.
The brick I had was regulated, but if it was unregulated (~13V with this ~50% load), it would have been too bright and then I might have added a suitable power diode in series to drop the brightness with 1V.
The paper Chinese lanterns were purchased at the Dollar Store ($1) and painted with clear exterior Urethane.. The LEDs were free surplus ( my luck) and adhered to clear strips of scrap polycarbonate plastic bent into a bracket for fastening into the bottom ring with short self-tapping screws. A spring metal wire stretches the lantern from top to bottom.
Immersion...