More Griping About Missing Standards LED lamps and lumens
I sure hope this does not place a burr under anyone's saddle, but get ready because I am going to lapse into (lecture?) mode...
So I take the advice of Mr Wizard. I purchase 12 volt 10 watt LED chips. They need heatsinks. I connect the power supply and the light flashes as bright as 60 amperes of arc-welder light only pure white. I have the chip solidly heat-sinked to a plate of aluminum with zinc oxide compound. The light eqvt. equals around SIX 30 watt 12 volt fluorescent fixtures.
I am going to couple the 10 watt chips to an LED dimmer, a PWM control with a knob. At full potential a chip demands a lot of heat sink, possibly with a 12 volt micro muffin fan.
How bright is bright? Even with my poor eyesight, I feel one single chip will light a 12' X 12' room as well as a single 100 watt incandescent lamp - with a higher number Kelvin emission it is hard to compare. The beam spread is incredible - around 140 degrees.
I will use the $2.95 Chinese specials, rated at 10 watts. Mounted to a flat fixture. I figure SIX of them will give me about 50% of the illumination of a single $4.95 10 watt AUTHENTIC LED chip.
So thank you Mr. Wizard!
I will work out the heat sink and PWM controls to suit my application.
And gag whenever I see a wattage reading for a multi-LED plate.
- I purchase LED chipset plate lamps
- Various wattages 2, 3, 5, 10, 20
- I connect them to a precision power supply 12.00 volts
- With a 5-1/2 digit bench DMM
- I read I amperage draw
- I multiply volts times amps
- Anywhere from one-fifth to one-fourth of the advertised wattage
- There is no mention anywhere EVER of a caveat of "equivalent to" which would be stupid because flourescent, incandescent, or halogen?
So I take the advice of Mr Wizard. I purchase 12 volt 10 watt LED chips. They need heatsinks. I connect the power supply and the light flashes as bright as 60 amperes of arc-welder light only pure white. I have the chip solidly heat-sinked to a plate of aluminum with zinc oxide compound. The light eqvt. equals around SIX 30 watt 12 volt fluorescent fixtures.
I am going to couple the 10 watt chips to an LED dimmer, a PWM control with a knob. At full potential a chip demands a lot of heat sink, possibly with a 12 volt micro muffin fan.
How bright is bright? Even with my poor eyesight, I feel one single chip will light a 12' X 12' room as well as a single 100 watt incandescent lamp - with a higher number Kelvin emission it is hard to compare. The beam spread is incredible - around 140 degrees.
I will use the $2.95 Chinese specials, rated at 10 watts. Mounted to a flat fixture. I figure SIX of them will give me about 50% of the illumination of a single $4.95 10 watt AUTHENTIC LED chip.
So thank you Mr. Wizard!
I will work out the heat sink and PWM controls to suit my application.
And gag whenever I see a wattage reading for a multi-LED plate.
