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.
Lumen is a measure of amount of light emitted by the projector; in laymanâs terms, the brightness. A low lumen value â 1500 or less â will only be visible in a dark room. 3000 lumen and higher will be visible in daylight, but truthfully any projected image will look better when thereâs less ambient light.