Understanding LED Vocabulary
I hope the title describes it. I am looking for some LEDs on line and the descriptions mean little to me. Here is one for the LED I would like to purchase. T10 194 W5w Cob 8 I get the 194, b...
Forum Discussion
When purchasing off of eBay I ask the vendor for a milliamp spec. They seem a bit loose with watts and lumens but I have had good luck yanking the ma value from them. 2.5 to 3.5 watts seems to be the max for cob emitters. Because of heat sink limitations. Haven't purchased cobs lately but many earlier ones had pretty yellow and blue hued chips. 5000 kelvin seems to be pure white. 4.5K might br pretty close to sunlight 3.75K duplicating an incandescent household light bulb and 3K to me reminds me of a Wal-Mart parking lot at night.
The big LED bugaboo is shedding the heat. I simply do not trust a cob vendor to supply a product of expected color. I purchase a few samples run them at 13.5 volts for a few days then decide if I want more. Chinese vendors on eBay seldom are manufacturers. They purchase lot quantities then from another manufacturer later on. Lin Zao Peng told me there are at least a hundred cob plants in Guangdon province alone. It might be worth a look on Amazon to find a vendor with a high stars rating and impressive sales stats. Product Reviews went through a scandal with paid reviews. Definitely an EnCaveat Emptor area.
Hopt this helps
The big LED bugaboo is shedding the heat. I simply do not trust a cob vendor to supply a product of expected color. I purchase a few samples run them at 13.5 volts for a few days then decide if I want more. Chinese vendors on eBay seldom are manufacturers. They purchase lot quantities then from another manufacturer later on. Lin Zao Peng told me there are at least a hundred cob plants in Guangdon province alone. It might be worth a look on Amazon to find a vendor with a high stars rating and impressive sales stats. Product Reviews went through a scandal with paid reviews. Definitely an EnCaveat Emptor area.
Hopt this helps
