How Many Lumens Are In A 25 Watt Incandescent Light Bulb

P w φ v lm η lm w lumens to watts table.

How many lumens are in a 25 watt incandescent light bulb. To replace a 100 watt w incandescent bulb look for a bulb that gives you about 1600 lumens. If you want something dimmer go for less lumens. As a rule you ll replace a standard 75 watt bulb with an energy saving bulb of about 1100 lumens. Rely on new bulb labeling standards to show lumen output and help you choose the right brightness for your needs.

Are you looking for an energy efficient replacement for your 25 watt light. On average an incandescent bulb produces around 14 lumens per watt compared to 63 lumens for energy saving compact fluorescents cfl and 74 for led bulbs. Examine the label of the led bulbs at the store. Replace a 75w bulb with an energy saving bulb that gives you about 1100 lumens.

The power p in watts w is equal to the luminous flux φ v in lumens lm divided by the luminous efficacy η in lumens per watt lm w. Lumens for incandescent bulbs are. Energy saving lamps have high luminous efficacy more lumens per watt. 40w equals 450 lumens 60w equals 800 lumens 75w equals 1100 lumens and 100w equals 1600 lumens.

Wattage to brightness comparison. Some of the common wattages vs. Watts to lumens calculator lumens to watts calculation formula. Some of the most energy to light efficient led bulbs are now reaching over 120 lumens in energy star tests.

Since most household bulbs are 40w 60w 75w or 100w you may be able to memorize their equivalent lumens. Replace a 60w bulb with an energy saving bulb that gives you about. For example to replace a 25 watt light bulb for a led lamp the amount of lumens must be compared.