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.
Energy efficiency. Energy effectiveness encompasses luminous efficacy of the light source and appropriate power supply in lumens per watt. (lm/W), optical efficiency of the luminaire (light fixture), and how well the luminaire delivers light to the target area. without casting light in unintended directions. The goal is to provide the necessary illuminance in the target area, with. appropriate lighting quality, for the lowest power density.