5到6W功率下SST50亮还是R5亮？
5到6W功率下SST50亮还是R5亮？ 这个连问都不用问，SST50秒杀R5啊 R5能上6W？ 这个连问都不用问，SST50秒杀R5啊lamper 发表于 2010-3-22 17:15 http://www.shoudian.org/images/common/back.gif
反了。。。。。SST50的光效不如Cree的 莫要迷信SSTSST除了发光面积大了 能上更大电流 其他地跟CREE没法比 本帖最后由 toud 于 2010-3-22 23:53 编辑
反了。。。。。SST50的光效不如Cree的
xiewg 发表于 2010-3-22 18:42 http://www.shoudian.org/images/common/back.gif声嘶力竭的R5对阵游刃有余的SST50，真的会获胜吗？怀疑
计算5.6W时的情况
SST50，3.2*1.75=5.6W
XPG，5.6/3.5=1.6A
假设1.6A时与1.5A时亮度正比增加 (1.6/1.5)*493=525.87流明，而1.75A时SST50是500--600流明。 3000K的SST50！爽 发光效率已经做出了最好的回答。
SST的意义在于更大的功率，
而XPG的意义在于垄断了3~5W的LED，这个区间内，SST不应该出现。 好比比较中轻量级和重量级两个举重运动员谁的力气大一般 这个连问都不用问，SST50秒杀R5啊
lamper 发表于 2010-3-22 17:15 http://shoudian.org/images/common/back.gif
我认为R5完胜SST50，因为R5光效比SST50高得多，有这样的小电流，亮度甚至比MCE还低 能这样比吗？？？ R5吧，同功率肯定光效好的强吧 一个饿着肚子，另一个吃饱了撑着。 8知道到底谁亮，虽说CREE光效高但也许瘦死的骆驼比马大···呵呵 3000K的XP-G， 1.5A/463lm，这个是cree的公开数据 Cree Raises Performance Levels for XLamp® XP LEDs
DURHAM, N.C., February 10, 2010 — Cree, Inc. (Nasdaq: CREE), a market leader in LED lighting, announces the commercial availability of higher-flux bins for warm- and cool-white XLamp® XP-E LEDs and higher maximum forward currents for both XLamp XP-E and XP-G LEDs.
XLamp XP-E cool white LEDs are now available in the R3 bin, 122-130 lumens at 350 mA, delivering up to 116 lumens per watt. Warm-white (3000 K) XP-E LEDs are available in the Q3 bin, 94-100 lumens at 350 mA. The maximum forward current for all XLamp XP-E white LEDs is now increased to 1 A, enabling more design flexibility and higher light-output applications.
In addition, the maximum forward current for XLamp XP-G LEDs is now raised to 1.5 A, delivering up to 493 lumens at 92 lumens per watt. XP-G LEDs deliver high efficacy at high currents, which can allow new high-performance LED applications where more light in less space is necessary.
“While others continue to offer 100-lumen LEDs as their highest performance level, Cree is leading the industry in lighting-class brightness and efficacy,” said Paul Thieken, Cree director of marketing, LED components. “Our lighting-class LEDs are designed to deliver the performance our customers need: hundreds of lumens, high efficacy, good quality of light and long lifetimes.”
Cree’s broad family of XLamp LEDs is available through the Cree distribution network (www.cree.com/buyxlamp). XLamp® XP-G LEDs available up to 109 lumens per watt at 3000 K CCT
DURHAM, N.C., March 17, 2010 — Cree, Inc. (Nasdaq: CREE), a market leader in LED lighting, announces the commercial availability of the award-winning XLamp® XP-G LED in warm- and neutral-white color temperatures (2600 K to 5000 K CCT). These new XP-G LEDs extend Cree’s highest level of light output and efficacy across the white color spectrum, driving general lighting applications such as LED replacement lamps, outdoor area and commercial luminaires.
The warm white (3000 K) XLamp XP-G provides up to 114 lumens and 109 lumens per watt at 350 mA. Driven at 1.0 A, the XP-G warm-white produces up to 285 lumens at 84 lumens per watt, which is four times the light output than the highest available XLamp XR-E warm-white LED at equal efficacy.
The neutral-white (4000 K) XLamp XP-G provides up to 139 lumens and 132 lumens per watt at 350 mA. Driven at 1.5 A, the XP-G neutral-white produces up to 463 lumens, which is four times the light output of the XLamp XR-E cool-white LED at equal efficacy.
“We are excited to be working with the newest Cree XP-G LEDs,” said Bob Fugerer, president, Sunovia Energy Technologies, Inc. “The extremely high efficacy levels are enabling us to offer our Aimed Optics™ luminaires in a neutral color while maintaining the same pace-setting mounting-height-to-pole-spacing ratio and fitted target efficiency that we previously achieved with cool-white color temperatures.”
“Cree is once again setting industry-leading efficacy levels in warm and neutral white,” said Paul Thieken, Cree, director of marketing, LED Components. “These new XP-G LEDs can enable LED lighting products that not only meet but exceed the current ENERGY STAR® luminaire and lamp requirements. Cree is accelerating the LED lighting revolution by pushing through performance milestones.”
XP-G LEDs deliver high efficacy at high current, potentially reducing the required number of LEDs, as well as the size and cost of LED fixtures. Neutral-white and warm-white XP-G LEDs are commercially available now in the industry’s smallest ANSI-based chromaticity bins. To find an authorized Cree XLamp distributor in your area, please visit www.cree.com/buyxlamp. 没玩过R5跟SST的，现在还是玩Q5的 如果是能到r5肯定亮 sst效率不高要不是单核 早没意思了 一个飙蹄党+一群纸上谈兵客。 LS的做个测试
我觉得还是实践的结果 另人信服
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