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.
Raw Lumens. The raw lumen output of a light is actually a theoretical value rather than an actual measure of useful light output. Manufacturers calculate the number of raw lumens by taking the number of LEDs in a light and multiplying that by the maximum output rating for those LEDs. For example, if a light uses 10 LEDs that have a maximum output rating of 100 lumens, the raw lumen output would be 1,000 lumens (10 x 100 = 1,000).