steveydvee
Well-Known Member
Looking at buying a fixture with a 800 watt LM281b fixture as opposed to same fixture with LM301b. What is the difference between the two and is it significant? Almost a 50% price difference.
Anyone know about LM281B?
- Thread starter steveydvee
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PJ Diaz
Well-Known Member
Main difference as far as we're concerned is lumens/watt, as shown in the screenshots below. The spectrums are pretty similar, and some manufactures are using more 281's than they would 301's so that they can be driven at lower current for better efficiency, in at attempt to match the overall efficiency of a 301 fixture, and based on some testing, it seems to be working. The 281's are also a higher powered diode, which additionally helps with efficiency at lower wattage. Also 281's are slightly rectangle, while 301's are square.
steveydvee
Well-Known Member
YOU ARE THE MAN! This only reinforced my mindset. As I was a bit wary because the company did tell me that the lights are very comparable but I thought there is no way. Then I took a look at the chip and it showed higher wattage and I read somewhere online that the lower you run it the more efficient. So it'll be roughly 2,500 LM281B instead of 2,500 LM301B on a strip setup running off 800 watts of drivers.
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