
Upon receipt, each of the 6 LED bulbs in this set of 6 will glow with nearly equal brightness and intensity from both a 12V DC (12.6V car battery) and Malibu's standard 88-watt low-voltage outdoor lighting transformer. I am running four of these lamps in parallel on 4 backyard pagoda lights that previously ran on 60w, 120v AC. All 4 lights have been disconnected from the home's mains power supply and rewired to operate from a 12VAC underground wire which is now powered by a redundant Malibu 12VAC low voltage outdoor lighting transformer. Each new LED consumes 7W, so 4 bulbs together require 28W, which is less than 50% of the capacity of an 88W Malibu transformer. A slight flickering of the last lamp in the wiring section (50 feet from the power supply) was observed. , so a 100W full-wave bridge diode module and a 5A/12V self-healing circuit breaker were added at the transformer output before the first LED. The lamps stopped flickering and the overall intensity improved slightly and evenly when converted to DC ( The measured voltage before installed the jumper was 12.8 VAC, now lamp #1 shows 12.3 VDC and lamp #4 shows 12.1 VDC All OK). , as well as two replacement LED lamps as spare parts, REMAIN STORE in a box of 6 pieces. Actuality outdoors, in closed lamps will be a real test. The maintenance cycle is forecast to be 10 hours per day x 365 days x 5 years = 5500 hours. Are you hoping these bulbs will last 11,000 hours // 10 years? Many AC LEDs are rated for 20,000 hours!