Big difference in brightness 5000K vs 4000K? Color rendering much worse in 5000K? Is it true you can see the green glow at 5000K?
Do you realize that you are asking someone who posted that 9 months ago?
There is a big difference in brightness. 4000K is rated as 11000 lumens, while 5000K and 6500K are rated as 14000 and 15000 lumens respectively.
I just bought the 5000K version, much better tint than the MF01 mini 6500K (SST20x7) I have, no more green shift at low, its more yellow, than green. On the other hand, both flashlights pale in comparison to my Nichia 219c (astrolux s43).
Thank you for the information. I had the opportunity to compare personally. In fact, the 5000K seems a little brighter, but the 4000K CRI makes up for it. I choose 4000K.
can i still request a Group buy Coupon here?
The old code (bgmf01s) still works but gives a price of $89 on the BG international site. bg1128 code gives a lower price at $84. May be higher or lower depending on your site.
One of BG’s little tricks. Prices can vary greatly depending on which site you use. To change sites go to account settings.
Old coupon still active.
i just bought one in Sand
thanks for the code 
Hello! Has anyone tried to make the light more flooded? I like the flood light on the mf01, can you do something like that on the mf01s?
How different are they? They both use TIR lenses so the beams should be fairly comparable. As a quick and cheap experiment you could apply some frosted clear tape over some of the LEDs to get a little more wider beam.
I don’t have it yet, I’m going to order it soon. In the review, it seems to me that it has half the side exposure. Maybe my eyes fail me.
hey freeme, are there coupon codes for for this listing? i want to buy with battery
if not, ill just take the regular group buy coupon please
I have the MF01, MF01S, and the MF01S MINI. These are all awesome lights. They should be on everyone’s short list.
Sent. Price is $95.90 for MF01S with 4x30Q 18650 rechargeable batteries. Let me know if anyone else is interested.
Hello there.
I want to ask a question a little off-topic.
As I see, a lot of people complain about the factory defect of Astrolux MF01S flashlights, their LEDs fail, drivers burn out, the flaslights starts to work incorrectly, etc. The question is: where to buy components for MF01S: ready MCPCB, drivers, plates, etc? I only see spare parts for the MF01 and there are none for the S version. I’m not a professional in flashlight making or soldering and I can’t fix it myself, just by using a spare part, but there aren’t any. Some time ago, I bought this flashlight on AliExpress, until I got it, but it’s already scary. 
Contact them on aliexpress through the Mateminco store
Thank you for your recommendation. I will try to contact the store Mateminco on AliExpress, if I have any problems with the flashlight. I hope they will sell me the spare parts, If I didn’t buy a flashlight from their store and I have a renamed version of Astrolux.
Good luck, sir.
Where are all these people complaining about the MF01s? I’ve missed it somehow and I’m interested.
Write in Google, for example, “Astrolux MF01S malfunction”, “MF01S burned emitters”. Check this forum topics with it. Some videos on YouTube where people share their problems with MF01/S in the comments. Etc.