光衰小于初始值的30%.比白炽灯节能80%.怎么翻译?

6.Service life: The key to quality relies on the service life that depends on lumens depreciation. The smaller lumens depreciation is, the longer service life lasts and hence the dearer LED costs.
7.Chip is the illuminant of LED and, it varies a lot in prices. Chip made in Japan or the United States are expensive. Generally, prices of chips made in Taiwan or on the mainland are cheaper than those Japanese/American ones(CREE).
8.Size of chip: Side-length represents size of chip. Quality of LED with large chip is superior over that with small one. Thus its price is in proportion to the chip size.
9.Colloid: As colloid of ordinary LED is usually made from epikote. Prices for LED with uvioresistant design and fireproofing agents（或：retardant、从化学角度更专业）are more expensive, and outdoor LED light-fixtures with high quality should possess superiorities as uvioresistant effect beside fireproofing. Each item indicates respective designs, moreover such designs are appropriate for various applications. Reliability design of LED light-fixtures includes factors as electric safety, safety on fireproofing, application setting safety, machinery safety, safety for body-health, safety application time, etc, which should be in accordance with international/national standards related in terms of electric safety.
10.LED lamp bead with Type 3014 may come up to light as 9-11 lumen as of single one.

光衰实验是持续1000小时,但按要求每天要停止2次,每次15分钟.这两次间隔要2个小时.
这两种测试结果差别很大?没有公式计算正常值应该是多少.

这个问题呢太简单,你首先明白什么是光衰含义,新拿的光源点亮测试保存数据日期时间,之后点灯常亮（最有效的方法）1000小时候,测试现在的光通量,那最初的测试结果和老化后的结果对比差值就是光衰度!

光衰是指灯燃点一定时间后光通量比刚开始下降的百分比.10000小时流明维持率95%即10000小时光衰为5%.