The luminous flux ΦV in lumens (lm) is equal to the power P in watts (W), times the luminous efficacy η in lumens per watt (lm/W):ΦV(lm) = P(W)×η(lm/W)Solumens = watts × (lumens per watt)orlm = W × (lm/W)...
They're good values and they're highly energy efficient for the money (each draws less than 10 watts). These dimmable bulbs also work well with dimmer switches and -- most important for overhead lighting -- they're both nice and bright, each putting out comfortably more than 700 lumens....
How many cups in a quart? When using cup and fluid quart measurements from the same country, one quart equals 4 cups or 2 pints. 1 Quart (US, fluid) = 4 Cups (US) 1 Quart (UK, fluid) = 4 Cups (UK, imperial) The above conversions should help 95% of people. It's worth noting...
One way to compare lamps is by looking at how much energy they need (measured in watts) to produce the same amount of brightness (measured in lumens). Dividing these two numbers, we get the number of lumens each lamp can produce for a single watt of energy. Looking at the chart here,...
Electromagnetic waves can come in many different wavelengths and different frequencies, so long as the product of the wavelength and frequency of a given wave equals the speed of light (that is, λf = c). Think of a squad of wrestlers from the same narrow weight class; some will ...
You might also like: How Many Lumens Do You Need for a Work Light? What’s the Difference Between Lumens and Watts? Most bulbs have the term watts listed on their packaging. However, lumens and watts are two different things. Watts describe the amount of power that the bulb uses for ill...