Mini Pecan Pie Muffins. Iâm sharing another tried-and-true recipe from my cookbook. I love these mini muffins because theyâre delicious, easy to make (you donât even need a mixer), they freeze well, and theyâre done in 20 minutes! I brought these to school today to share in the teacherâs lunch room and they disappeared.
Example: Calculate Streetlight Watt of following Street Light Area, 1  Required Illumination Level for Street Light (L) is 6 Lux per Square Meter. 2  Luminous efficacy (En) is 20 Lumen per Watt. 3  Required Street Light Area to be illuminated (A) is 1 Square Meter.
The Results: LED vs. HID Lighting Efficiency Higher system efficiency and slower lumen depreciation combine to provide substantially higher overall efficiency with LEDs compared to HID sources. For example, the chart below shows the expected performance of a 100 watt MH street light versus a comparable the DuraStreet Series LED Light Engine: As shown in the chart above, the lumens per watt provided by a DuraStreet Series LED Light Engine decline gradually over a long period. However, the lumen output of the equivalent HID lamp declines much more rapidly, and the HID lamp must be repeatedly replaced during the same operating period.