Important as well is that the best LED grow lights use specific wavelengths of light that are needed the most by your plants. Traditional grow lights blast your plants with light and as a result much of the light is wasted.
1 More than 90 people out of 100 who have a bypass are still alive 5 years after surgery.  How long a bypass lasts depends on how long the blood vessel grafts stay open. The risk of needing another operation gets higher each year after your surgery. After 5 years, about 2 out of 100 people need another surgery.
I think I've heard more poor information about this than about any other topic in cardiology. Bypass grafts can last for really long periods of time. I have seen many instances where the graft looks almost brand new on angiograms done 15-20 years later. Bypass grafts do close however. About 50% of the grafts placed are closed in 10-12 years ( that means that if four bypasses were placed in a patient, then 2 would be expected to be closed in 12 years).