Watts is how much energy a light bulb uses, but Lumens is how bright it is. Lower wattage products like LEDs and CFLs save energy by using less wattage to operate, but their brightness, or lumens, is equivalent to the traditional incandescent light bulbs that they replace. For example, a 6W LED replaces a 40W incandescent light bulb but saves 34 watts in energy.
Simply put, color temperature is how the light appears. The lower the color temperature, the warmer the light makes a room appear (2700K), the higher the color temperature, the cooler the light will appear (5000K and up).
A Shape - General Use
B Shape - Decorative or Decor Use
G Shape - Globe
R Shape - Reflector, typically small indoor directional lighting
BR Shape - "Bulge" Reflector, this is indoor directional lighting
PAR Shape - Parabolic Reflector, indoor and outdoor directional lighting
T Shape - Tube shape or fluorescent lighting
The lighting facts label which appears on every lighting package, provides brightness (lumens) rating
and the energy savings estimate
Life in years, based on the average use of 3 hours per day, 365 days a year
Light appearance is the color temperature of the light
Energy usage = wattage
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