... 20Lm/W, energy saving lamp 50Lm/W2. Long life timeCan work 50000hours with the decay of emitter lower than 15%. 3. High ... 4. High energy savingCompared with incandescent and halogen, LED will save 85% energy and 50% than energy saving lamp.5. Green and cleanCold light source design, ... cutting hole 2'', 2.5'', 3'', 4'', 6'', 8'' can replace the traditional down light directly, unnecessary to cut new ...