All Categories

  • All Categories
  • Cell Phones & Accessories
  • Consumer Electronics
  • Electrical & Tools
  • Hobbies & Toys
  • LED Lights & Flashlights
  • Computer & Office
  • Sports & Outdoors
  • Automobiles & Motorcycles
  • Home & Office
  • Apparel & Accessories
  • Health & Beauty
  • Latest Discount

  • Popular Searches:

Wish
DX  » led 20w »  view all 20w led emitter » 20w led emitter
Hot Products
Hot Categories

20w led emitter

View
view all 20w led emitter
view all 20w led emitter
Buy a 20w led emitter from DX.com! It's your best choice. DX also offers coupon discounts as high as 50% for products on the dx website, offering you huge savings! Your satisfaction is our reason for working harder and we aim to make your shopping experience easy and pleasant.
Related Hot Products: 20w led warm, 20w yellow led
aaaaa

20w led emitter Customers Reviews

  • 20W LED Emitter (18V~20V / 800 Lumens White)

    20W LED Emitter (18V~20V / 800 Lumens White)

    Very bright, very hot!

    posted by ambientmind

    Very bright output and small form factor (for being 20w!) Runs well off of 18-20v as stated, 800 lumen claim seems to be right on. Fun to say you have an 800 lumen led! Low amperage consumption.
    I built a light around this led, using the metal reflector, a large chunk of aluminum, and a copper heatsink/fan combo designed to cool vga chipsets that moves 6cfm as one large heatsink, but it still runs hot. I'm not sure what the original use intentions were for this led, as it seems to require a massive heatsink. I gave it a 2 on usefulness because of this reason.
    If you like playing around with leds, this one is for you. However if you are going to use it for extended use lighting, this just simply wont work because of the heat isssue.
  • 20W 15000K 1500-Lumen Cold White 20-LED Emitter Metal Plate (12~15V)

    20W 15000K 1500-Lumen Cold White 20-LED Emitter Metal Plate (12~15V)

    Nice Light

    posted by CraigXC

    These are very nice, bright emitters at a good price - good lumens per dollar. The "cold white" light is a bit bluish, but pleasant - much nicer than "cold white" fluorescent lights.
    Like most LED emitters, the ratings given would be the max - it's overdriving them. Better to run them at well under 1/2 the rated current for long life. Running with 1/3 current, they'll be a little more than 1/3 brightness, the way LEDs work.
    The voltage works out well for 12 volt operation, eg, 12.0 V with .68 or 1 ohm current limiting. With batteries, higher voltage will mean higher value series resistors to get the same currents. (or use constant current supply)
    Safety: Use with frosted diffuser - probably bright enough to damage vision at close range direct.
    I'm using two each for ceiling light fixtures, run from 12 volt DC power adapters. With LED lights like this and Cree XM-LAWT in my house, I'm saving 20-30 $/month on electricity bills.
  • PRIME 20W 2000-Lumen LED Emitter Metal Plate - White (16~18V)

    PRIME 20W 2000-Lumen LED Emitter Metal Plate - White (16~18V)

    Cheap and extreme bright light!

    posted by Perkelehnet

    The light is incredibly bright! I was shocked when I first plugged in the LED Driver (not included)
    It's big, wich was unexpected, but still good.
    I'm going to use this LED outdoor, outside of my garage. Connected to a motion detector, it'll turn on when I arrive with my car, and light up the area. Perfect, I assume :-D
    I bought the LED Driver (sku.42741) for this item, and it fits perfectly.
    Incredibly bright, I have to say it again..
    Including LED Driver and heatsink, you'll get a BRIGHT LED-light for under 30$!
  • 20W 3200K 1600-Lumen Warm White LED Emitter Metal Plate (16~18V)

    20W 3200K 1600-Lumen Warm White LED Emitter Metal Plate (16~18V)

    Very Bright/warm color, poor temperature tolerance

    posted by DrBlood

    I do like the LEDs size and colour, it's pretty awesome, and could reccomend it if you baby it and keep it fan cooled to oh, below about 70 maybe.It's very bright and has a nice warm colour temp, slightly pinkish and a little yellow at the edges of the light spill.
    All modern LEDs are rated to over 110degrees C and 'should' be fine operating up to 120+ deg c, with a manageable loss of luminous efficacy, perhaps 20-30 %.I used a very large 'pin fin' heatsink i took off a northbridge on an old motherboard,This heatsink is easily able to handle the heat this LED generated, but i did have a problem with this LED anyway.NOTE - an LEDs rating in Watts is it's total power dissipation, NOT its 'Heat output rating'.So a 20W LED will generate less than 20W of heat.LEDs that have a luminous efficiency of 100lm/watt have a power/lumen efficiency of about 15%, so20W - (0.15x20W) = 17W of energy not used to create light, ie HEAT.This LED isn't quite that good, so it will be about 18W of heat to dissipate.
    It still works, its just ugly and dissapointing, i may return it or reseat the lens with the real adhesive, we'll see.BTW - LED lighting is my profession so i love playing with and testing these things, especially as they cost just pocket money from DX.
bbbb
Smartphones
Electronics
DIY & Fun
Indoor & Outdoor
customer survey
customer survey

WHY CHOOSE DX.COM?

  • Over 300,000 products
  • Extremely low prices
  • Timely refunds and replacements
  • Worldwide free shipping

SIGN UP FOR SAVINGS!

Get $3 Gift Cardevery month!

Subsribe and Win$50 GIFT CARD!

Customer Service Express

Partner with DX

Policy & Information

DX Everywhere

© 2006~2018 DX.com. All rights reserved.

Note:Stock and Availability shown on this site is for your reference only. While we strive to provide the most accurate and timely stock and availability information, availability information may become out of date and may change between the time you added an item to cart and the time your order is received.
Quantities on clearance items are limited. Prices are current at time of posting. DX Reserves the right to change prices at any time without notice.

Partners: DX Wholesale Website l 寻求供应商

v5.1.0322