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How many watt energy saving lamps are used in a room of 30 square meters? Is the word that uses wattage big harmful to glasses of 1 year old child
40W is enough
Can a 7 to 9 watt LED bulb meet the lighting requirements of a room?
7W LED bulb is equivalent to the brightness of 20W energy-saving lamp;
9W LED bulb is equivalent to 28w energy saving lamp
General household energy saving lamp a room 7W, 12W, 15W, 20W. 20W has been very big
Therefore, using LED bulbs, 7W is enough, if the area is a little small, 5W is OK
PS: I use 5W, the room area is 20 square. Meet the normal lighting
How bright is a 3W LED bulb
3W LED is equivalent to 9W energy-saving lamp and 25W incandescent lamp. The premise is that led is relatively high-grade. The current LED bulb can reach 100lm / W. if the design is not good, especially the heat dissipation is not good, the light loss is very serious
How many watts of LED energy saving lamps are suitable for home lighting?
Is the wattage of LED energy-saving lamp the same as that of traditional energy-saving lamp and incandescent lamp,
Energy saving lamp (including fluorescent lamp) is about 40 lumens per watt (measured value)
The incandescent lamp is about 10 lumens per watt
3LED lights are about 70-90 lumens per watt
So at the same wattage, the brightness of LED is 2 times that of energy-saving lamp and 7-9 times that of incandescent lamp
RELATED INFORMATIONS
- 1. I want to set up a local LED energy-saving lamp assembly plant for household lighting Open a small factory, 3-5 people, assemble LED energy-saving lamps, how many energy-saving lamps can one assemble?
- 2. How many watts of energy-saving lamp is the brightness of 5W led
- 3. How many 100W energy-saving lamps can replace 25 40W incandescent lamps
- 4. How many watts of incandescent lamps are 10 watts, 13 watts, 15 watts, 20 watts, 30 watts and 40 watts equivalent to?
- 5. How much electricity does a 60W appliance use 24 hours a day?
- 6. How much electricity does a 90 watt appliance use per hour
- 7. How much electricity does a 180 watt lamp consume per hour There are five rooms in the quiet house. If only one 36 watt energy-saving lamp is on in each room, how much electricity does the quiet house consume from 6 p.m. to 6 a.m. the next day? (1000 Watt lamp consumes 1 degree per hour)
- 8. How many kilowatts of electricity does a 150 Watt electric stew use in an hour
- 9. How much electricity does a 1200W electrical appliance consume per hour?
- 10. Know the battery capacity 450mah and power 22W, find the time t?
- 11. The room lamp has been set, but I don't know how many wattage energy-saving lamps to match Most of the lamps are chandeliers with lampshade. There are two or five lamps. Now I have some doubts about the selection of bulbs. Do you choose energy-saving lamps or other bulbs? In addition, the area of each room is listed below. Please tell me how many watts of lamps these rooms need to choose Living room: 16 square meters Restaurant 6.5 square meters Master bedroom 13.5 square meters Second bedroom 9 square meters The study area is 7.5 square meters Toilet 4 square meters Kitchen 5 square meters
- 12. The actual heating power is 2000 Watts, a total of four floors, a floor of nine houses Each floor is divided into four rooms and five rooms in a group, @ because of the corridor @, the 6-level line is used, and the switch is 63 A and 40 a respectively. The fifth floor is three live lines, and the nine rooms are divided into three groups, and the switch is 32 a,
- 13. How many hours can a 25 watt bulb normally emit light when consuming 2 kwh of electric energy
- 14. How long does one kilowatt hour of electricity keep a 25 watt bulb on How long can a 25 watt bulb last for a kilowatt hour of electricity
- 15. If a 500 Watt electric rice cooker consumes 0.75 kwh of electricity a day, how long does it actually work?
- 16. The T-hour power consumption of an a-watt bulb is at / 1000 kwh. If the average daily power consumption is 4 hours, then two 25 watt bulbs share the same power consumption in one month (30 days) .
- 17. Known: as shown in the figure, in △ ABC, ab = AC, BC = BD, ad = de = EB, then the degree of ∠ A is () A. 30°B. 36°C. 45°D. 50°
- 18. Seeking the great spirit in mathematical problems A is an acute angle, and cosa
- 19. The inclination angle of the straight line x = 3-tcos20 ° y = Tsin (- 20 °) (t is not a parameter) is ()? （） 20 ° 160 ° a or B?
- 20. When x / k = y, X is proportional to y; when K / x = y, X is proportional to y; when kxy = 2, X is proportional to y; when K / x = 1 / y, X is proportional to y?