... With the information in the product description. But as so often, I forgive the measured (missing) 15% light output considering the price. I can, however, say nothing about the life - but only once as much more: after I bought the same bulbs a long time ago and this now has under his belt about 500 hours and the measurement values are still the same, it has worked for me already counted - it's just once again the price of many excuses. Product arrived well packaged and on time - true content - like to buy again
