Approximately 10% of patients report an allergy to penicillin. However, the majority of patients (greater than 90%) may not truly be allergic. Most people lose their penicillin allergy over time, even patients with a history of severe reaction such as anaphylaxis.
Additional lighting equipment is often necessary to compensate the low levels. Earlier it was common with light levels in the range 100 - 300 lux for normal activities. Today the light level is more common in the range 500 - 1000 lux-depending on activity.
As the importance of artificial light in the plant growing industry has increased, lamp manufacturers have begun to rate lamps specifically for plant needs. This article discusses and compares the different measures of  light level that are currently used for plant growth and hydroponic applications.