Can you guess what this is?
Can you guess what this is?
Below photo is taken with a flush light.
The photo below is taken with no flush light with a quick shutter speed.
You see, this is a board on which LEDs are mounted. There are 4 greens,
2 reds and 2 blues.
One of my family members tends to forget to turn off the room light after
reading books in the car. This causes a problem sometimes not to start
the engine next day. I decided to change the conventional room lamp to
LEDs using the board shown above. Using 2 units of boards and 2
additional red LEDs with a current limiting resistor,setting 100mA total, I
could get the light below. When you look close, you can notice there are 3
different colors.
You find it almost white when you see a bit away from the units.
From a distance it looks like this below.
only 1.2 Watts. Te difference is more than 4 times smaller but it is much
brighter than before. With the result, my family member can read books
easier with the higher color temperature of 8000K and it is twice brigter
than before measured by the illuminance meter for cameras. In addition to
those now there is a less possibility of the battery to run out. These 3 good
points are really useful. LEDs are now changing the world of lights in the house
and in the car.
