Canon EOS 6D – f/7.1 – 1/1250sec – 100 mm – ISO 200
– for challenge Flickr group: Macro Mondays, theme: Numbers, but could have been used also for the previous challenge theme Spiral
– energy saving light bulb
230V 50Hz 65mA 8W
FE233a-FST-8W 430lm 1505
– dimension: part of the bulb in the picture 6.8cm
– A compact fluorescent lamp (CFL) is a fluorescent lamp designed to replace an incandescent light bulb; some types fit into light fixtures designed for incandescent bulbs. The lamps use a tube which is curved or folded to fit into the space of an incandescent bulb, and a compact electronic ballast in the base of the lamp.
Compared to general-service incandescent lamps giving the same amount of visible light, CFLs use one-fifth to one-third the electric power, and last eight to fifteen times longer. A CFL has a higher purchase price than an incandescent lamp, but can save over five times its purchase price in electricity costs over the lamp’s lifetime.
White LED lamps now compete with CFLs for high-efficiency lighting. Similar to incandescent lamps (and unlike most fluorescent lamps), LEDs come to full brightness immediately with no warm-up delay. Frequent switching on and off does not reduce life expectancy as with fluorescent lighting. Light output decreases gradually over the lifetime of the LED.
Posted by HansHolt on 2020-07-20 02:23:33
Tagged: , lamp , energy saving , light , bulb , compact fluorescent lamp , CFL , glass , spiral , 531932 , 230V , 50Hz , 65mA , 8W , tabletop , bokeh , DoF , macro , canon , 6d , 100mm , Canon EOS 6D , Canon EF 100mm f/2.8 Macro USM , Macro Mondays , HMM