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.
Now choosing lights: A typical well built LED downlight provide 80-110 Lumens per watt, letâs consider 100 lumens. So we need total of 20W LED light to get 2000 lumens and 150 Lux for our sample bed room. That means number of LED lights = 20w( total light)/5W(single light) = 4. If you consider florescent tube or CFLs, they provide 60 lumens per watt, but in all directions. So you need more than 35W to get sufficient lighting.