Latest product on the market. This MR11 light lamp uses 6 pieces of high efficiency SMD (Surface Mount Device) LEDs to produce as much light as 30 pieces of common top view LEDs. Due to it's surface mount design, the heat dissipation is more efficient and that translate into more power output and longer life. At its peak efficiency, it produces over 70 lumens per watt, which is about 10X more efficient as incandescent bulbs and 2~3x more efficient than a compact fluorescent bulb! This is the ultimate power saving light bulb! It also lasts over 50,000 hours. If you keep it on 8 hours a day, 365 days a year, it won't burn out in 17 years! Please refer to the household lighting technology comparison table for the benefit of switching to LED lighting This LED lamp produces a YELLOW light. It's made of YELLOW LED chips emitting light mostly in the YELLOW spectrum. It's more efficient than a halogen, incandescent or fluorscent yellow light that use a colored glass to filter out other colors. Comparison of common household lighting technology: Incandescent light bulbs Fluorescent tubes and compact fluorescent light bulbs LED light bulbslight emission principlehigh temperature tungsten filament emits visible light along with infraYELLOW(heat) lightwaveselectron excited mercury vapor emits UV, which is absorbed by phosphor and re-emit as visible lightElectrolumninescenceEfficiencyVery low, only 3%~8% energy converted to light. most wasted as heathigher, between 10%~20% energy converted to light. The rest wasted as heatHighest, 20%~45% energy converted to lightLifespanshort, 1000~2000 hours10000 hours50000~100000 hoursCost to acquirearound $1 (for a 40W bulb)around $3 (for a 9W CFL bulb that's equivalent to 40W incandescent)around $17 (for a 4.4W SMD LED bulb equivalent to 40W incandescent)Cost to maintain over 20 year period (8 hrs/day)$59 in replacement bulbs (59 bulbs) $467 in electricity (0.2/KWh) total:?526$15 in replacement bulbs (5 bulbs) $105 in electricity (0.2/KWh) total: $120$0 in replacement bulb?still working) $51 in electricity (0.2/KWh) Total: $51Total carbon emission over 20 years* (8 hrs/day)3130 pounds of Carbon Dioxide for a single light bulb704 pounds of Carbon Dioxide344 pounds of Carbon DioxideSafetydanger of burning skin when hot and may cause fire in householdhighly toxic mercury vapor!None, completely safe. won't burn fingers when touched. NontoxicEnvironmental impactlots of burnt out bulbs become garbage, difficult to recycle. Lots of wasted electricity= more carbon emmision Mercury leak. Special handling and recycle requiYELLOWVery little. You only need to replace it twice or 3 times in your lifetime. Nontoxic. Highest efficiency means less wasted energy and less carbon emmissionsSturdinessFragile, sensitive to water and uneven temperatureFragile, sensitive to voltage fluctuations and frequent on/offrugged and robust. Suited for use under extreme conditions.Instant on & FlickerInstant on, flicker freetakes 5 to 10 minutes to reach peak output, may flicker nad cause eye strain and headacheInstant on, flicker freeEasy to find?EverywhereEverywhereHard to find in your local stores, but you can always order from us. We offer best price and quality, as well as fast and even free shipping(when you order $50 or more) *It's estimated currently in the US there's 1.34lb of CO2 released into atmosphere per every KWh electricity generated. This figure might drop as we switch to renewable energy. Detailed Specifications:Socket:G4 bi-pin 12V DC (most common MR-11 type socket)Volts:12VWatts:1.3Lumens: 65Equivalent Incandescent bulb wattage25WLEDs: 6 pieces of SMD, YELLOWUsage:Down light, spot lightSize:1.0" H x 1.37" Dia.Warranty:2 Years ****Please be aware that many stores sell LED light bulbs that claim to replace 40W or even 60W light bulbs. You need to look into detailed specs and see what's the total lumen output because that's the only thing matters. Don't be fooled by the number of LEDs in the light bulb. Some cheaper LED bulb uses 60 or even 80 LEDs yet only put out less than 200 lumens, while other professional LED bulbs use only a few high power LEDs and put out 500 or even 1000 lumens. The wattage of the LED bulbs are misleading as well. We once found a big chain store selling a 4W LED light bulb made by GE, yet in the fine print it can only product 100 lumens. At 25 lumens/Watt, it's not even as efficient as a compact fluorescent light bulb that costs 5 times less. So please find out what's the total lumen output of the LED product before you buy! *These color LED lamps might take longer to ship due to limited stock. Volume discount available! Special: BUY 5 GET 6! For a limited time, when you buy 5 pieces of this item, you will get the 6th free! All you have to do is to order 5 pieces, or any multiples of 5, you will receive 6 pieces, or multiples of 6. That's almost 20% savings! Restrictions* apply. *Restrictions: To qualify for the free item, you must buy 5 pieces of identical item, or any multiples of 5 of the same item. By default, the free item you receive will also be the same as the ones you order. You may, however, choose to receive a different item of equal or less value. You must email us immediately (within 24 hours) if you want a different item. If you are not satisfied with the product you receive, you must return all 6 or multiples of 6 to receive a full refund. Return shipping charge is customer's responsibility. Our warranty also covers the free bulb.