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.
This is often used to compare a light source ability to replicate the sun. In this case the sun is the reference light source. In layman's terms a CRI of 80 means that the LED light bulb is replicating 80% of the visible color spectrum that the sun would produce at the same color temperature.