Buyer should make sure how much lumens can produce LED lamp and how many watts the consumes. The example here has 1200 lumens at 13 watts consumption. Equivalent to about 92 lumens / watt, which is currently a very good value. Less than 85 lumens / watt is outdated models of recent years. One should not buy LED bulbs in stock when, for example, they are just in the offer. The efficiency is getting better every year, and the color rendering index also. Almost every year new models come out, the more lumens per watt and have have better color reproduction.