In a closed dark room, why is intensity of light bulb higher in late hours of night than in the evening (around 7-8 pm)?
2007-02-06 21:05:16 · 5 answers · asked by cbhagwat211 2 in Science & Mathematics ➔ Engineering
it's not. if you perceive it to be so then it's an optical illusion. you said in a closed dark room.
2007-02-06 21:10:14 · answer #1 · answered by Butch 3 · 0⤊ 0⤋
Most likely it's your eyes perception of brightness. Normal incandescent are voltage sensitive. Later in the day, the power company changes the output voltage to meet the demand for city wide consumption. Higher volts equal brighter bulb.
Note:
Metal Halide lamps take time to reach maximum intensity. 15-30 minutes.
2007-02-07 04:12:13 · answer #2 · answered by glycopure 3 · 0⤊ 0⤋
Unless there;s a trick, it will be a tiny bit brighter if the other lights are off, or maybe the city power produces higher voltage at night.
2007-02-06 21:11:23 · answer #3 · answered by Jim 7 · 1⤊ 0⤋
Many bulbs will burn out upfront by using oil on your palms. i be attentive to for a actuality that it is the case with halogen bulbs. try cleansing the bulbs with alcohol after installation or use sparkling gloves together as installation.
2016-12-17 04:23:07 · answer #4 · answered by Anonymous · 0⤊ 0⤋
generally, at night the power usage is lesser than at day time..so you have voltage.....so the bulb is more brighter...
2007-02-06 22:00:44 · answer #5 · answered by toby 2 · 0⤊ 0⤋