Selection Criteria Lamps
Topten.eu presents the most energy efficient retrofit lamps. 'Retrofit' means that the lamps directly replace incandescent lamps and halogen lamps. Product lists are structured by lamp base (E27, E14, GU10, GU5.3 and G53). Retrofit lamps have integrated control gear operated on main voltage (230 volts). GU5.3 retrofit lamps are operated on low voltage (12 volts).
Product information conforms with the manufacturer’s declaration. Most items must be indicated according to Regulation (EC) No 244/2009 or Regulation (EU) No 1194/2012.
Technical CriteriaAll LED lamps on www.topten.eu (Best Products of Europe) are characterised by the following criteria:
All compact fluorescent lamps on www.topten.eu (Best Products of Europe) are characterised by the following criteria:
* 105 mm is the length of a typical incandescent bulb
Order of presentation
Products are ranked according to their luminous efficacy. The order of presentation can be changed by clicking the tables’ headings.
Brand and Model
Brand with link to website. When there are multiple models, they are listed in a separate row (e.g. dimmable or not, various wattages, various radiation angles).
According to the following assumptions:
Note that not all lamps can be dimmed. Unfortunately, dimmable retrofit lamps are not always compatible with all types of dimmers.
Electrical power in watts (W).
The luminous flux is measured in lumens (lm) and indicates the radiated power emitted by a lamp.
Energy efficiency of lamps is expressed by the luminous efficacy in lumens per watt (lm/W).
According to EU Directive 92/75/EEC, household lamps operated on main voltage (incandescent lamps and fluorescent lamps with integrated control gear) and household fluorescent lamps (including single and double-ended lamps without integrated control gear) must be marked on their packaging with an energy label indicating their energy efficiency.
The light colour appearance of a lamp can be defined in terms of its colour temperature in degrees Kelvin (K). There are three main colour groups: warm whites < 3300 K; neutral whites 3300 K - 5000 K and daylight whites > 5000 K.
Lamp life time
Lamp life time in hours (h). For domestic lighting 1'000 hours is considered one year of usage.
Switching cycles indicate the number of times the lamp can be switched on and off before failure. According to Regulation (EC) No 244/2009, page L 76/11, a switching cycle consist of a period comprising 1 minute on and 3 minutes off.
Length and Diameter
Dimensions of the lamp in millimeters (mm). Note that the dimensions of retrofit lamps can be larger than corresponding incandescent or halogen lamps. They may not fit in all installations / luminaires.
Standards and labels