Another great video with excellent information. I seem to always learn something I didn't know when I watch your videos. Thanks for the posting. Cheers.

I bought two of each of those quantum headlamp and work lights and they are fantastic for the price

18650 works in these btw. Bought off amazon. You have to get a certain model that is flat bottomed. Much brighter than tripled on full charge!

Bought one of the $15.99 ones today along with the 310 lumen headlamp for $9.99 each with a coupon. I am impressed with both! You're allowed 3 with the coupon. Next time l'll buy 3. Awesome deal!

Great review, thank you! The QUANTUM 588 Lumen Tactical Flashlight is on sale for $8.99 right now, pair it with some ikea rechargeables it seems like a nice combo.

I have the green version of this. And I find that using this in the dark zooming out is best for long distance viewing of light versus zoomed in which is more of a up close way of seeing things.

I run my QFL-588 with 4 Eneloop AAA batteries. The barrel gets hot on a high beam which then becomes dim. I then have to turn it off and then back on to get the high beam bright again. I use it for walking the dog. Do you have any suggestions?

Is it possible to put a anti scratch film on the lens?

I was just down at HF and picked up two of their Braun 390 folding LED worklights. (which are fantastic btw) Now I have to go back and get a few of these too. That store can be addictive. Good thing for me its about 30 minutes from here and not around the corner.

Any clue on how to remove the lens for cleaning? I found the threaded ring at the bottom end that looks like a pair of snap ring pliers would allow you to unscrew it, and maybe access the bulb....but I couldn't get that to turn. Maybe use an O ring pick and pry out the black plastic retainer ring around the lens, from the top? Great light but very frustrating to work on....especially for a task that shouldn't take more than 6 seconds........

I used some Sugru and made a little loop for a key ring or lanyard. Love this flashlight.

Why is the tip of the quantum 588 shaped the way it is?

That 588 lumen light is great for the price, especially with the coupon as I did. Bought one and then after a while bought a couple more.

Your reviews are great. With a coupon the light can be purchased for $9.99. It’s quite a bargain.

Got one of this Flashlights they run good on regular alkaline batteries I tried rechargeable AA batteries light lights up brighter but gets really hot and the light goes down on Lumens maybe flashlight has a heat sensor or something but besides that for the price good flashlight.

I have two of them. But the focus mechanism won't stay in place on one of them. It slides too freely. Any suggestions?

I like my Quantum flashlight, but it keeps unscrewing. The head of light keeps unscrewing from the body. I screwed back on but keeps unscrewing

I love this flashlight I've had mine for 1 year, I just neednto get some rechargeable batteries

If you put the battery holder in backwards on the 588 lumen, you get a nice red light.

How do you take this flashlight apart ?

I got mine today very good but I would like it a drop longer maybe 3 or 4 inches more. But it works great it lights up a full room.

You can replace the three AAA battery cartridge with a 18500 lithium ion battery

How do you take apart the led portion of the quantum... I tried to unscrew the top of it and nothing.. I'm just trying to clean the glass around the led cause its dirty

I love my quantum 588, but the batteries have to be fresh for it to be that bright. They will work for a long time on a set of batteries overall, but after a while they're only as bright as your average pen light.

I have been using the Harbor Freight Quantum 588 Lumen Adjustable Focus Flashlight for at least 2 years. It is great for walking the dog at night. I love the flashlight and it works great. I wanted to have a lanyard attached to it so I actually drilled a small hole on the lip of the butt end and then attached a lanyard. Very simple and easy alteration. I have one thing that annoys me regarding the flashlight. It starts to gradually dim when I have it on high power. It is very noticeable within 5 minutes. I also find that if I turn off the flashlight for a few seconds and restart it the brightness comes back, but it starts to dim again. I also find that if I have it on low power there is no noticeable dimming. I use Eneloop AAA batteries and I thought that may be the problem, so I tried it with Alkaline AAA batteries and had the same result. What would cause this dimming? Is the high power too hot for the flashlight? Is there something I can do to correct this dimming effect? Is there another flashlight that will hold its brightness? Please reply with your answers.

Quantum flashlights are one of those rare items that are affordable but in turn they are great quality, most of the time this formula does not work for us the consumer, Affordable=bad but in this case i couldn't be more happier, i have this model and about every model they have made,i have them everywhere,in my car, at work, home etc, of probably 13 i have bought i had problems with one,thats it, the rest i have given away, lost ,destroyed etc. They are bright and rugged and cheap, one of our salesmen at work yesterday brought me one of the highest priced competitors to these flashlights (his personal one) to see if i could fix it for him,it had corroded inside and the switch on top was broken,i ordered him a new switch and cleaned it for him and while i was doing this i was thinking to myself "uh, i guess these high dollar ones break down sometimes too,lol" All in all i really like these flashlights and i recommend them for just about anything, i have used them and abused them.

I was in a bind the other night & this was the only flashlight I had putting a touchscreen back in a Cadillac. It seems I couldn't touch that damn thing without the strobe coming on. I was creating new cuss words, because the regular ones weren't working. I got it, that's all that matters.

Looks like I will be picking up the 588 for my maintenance pouch. I have a coast now that isn't bad but would like something brighter. Like I needed an excuse to go to Harbor Freight... lol

I use rechargeable AAA batteries. The flood mode is so great

i have the quantum 588 and it is very bright..i would recommend this light and the price is great !!

I bought 4 of these-one for the kitchen drawer, one for the basement utility closet, one for the car, and one in the toolbox.

Like that the 588 has the scalloped edge on the front that can be used as a self defense weapon.

I have one that I use at work (I'm a heavy truck mechanic) and it's a fantastic light. I only have 2 complaints, 1, wish it used an 18650 rechargeable, and 2, I wish it had a pocket clip. I carry a flashlight all day. It's daaark under a truck when you're doing an inspection.

They are great until you drop them and then the contact springs fail. gone through three of them.

Factory defect. The switch stoped working with light use. Bought one year ago. The switch was not secure and fell apart. Harbor freight won’t help over factory defect. I will try sending it back to them with my complaint.

Great great review...but one thing i wanted to mention is you accully can put a 18650 Lithium single battery😃😃 Its the spring at front of the flashlight that sturdy just push down a little further and it accully goes down and locks..been using this way for a month now work GREAT!!but like any flash light pushing true 588 lumens does get warm to the touch. I dont intend to use the flash light more than 15 min or less so works out for me. I'm sure if I were to keep it on for 1hr something would burn out and may no longer work. But but BUT I have to say the light is ACCULLY EVEN BRIGHTER!? with the 18650 Lithium Battery my dad was shocked! As was I🤯🤯🤯 FOR 10$ why not!

I have a quick question I purchased flashlight a week ago. I noticed the lens rattle when I shake the flashlight. is this normal? Otherwise I'm very happy with the flashlight

Where I live everyone throws the cupons out. So each weekend I go trough the crash cans and I have like 10 cupons of 20 percent discount.

Can you use a 26650 battery on this one?

Howto open forbateries

Flip the battery cartridge over it turns the light red

The camera is reacting to the high mode of that cheap flashlight because of something called PWM..pulse width modulation. All cheap flashlights utilize this. Also that particular flashlight has been going by numerous other brand names for years and you can get it for as low as $4 new on eBay....Hell, you can even get like 5 of them for $10 from some sellers. If you want a REAL flashlight and want excellent guidance and real education on picking one go to candleforums.com. Those guys know what they are talking about. You will also find out that you can get a far superior flashlight for less than $40. Focusable flashlights are cool and all but a good fixed beam flashlight will always blow the pants off a zoomie ( focusable). But if you must have a zoomie and want one that puts this Harbor Freight one to shame then look at the WOWTAC ZOOM/FOCUSABLE flashlight. It’s even smaller than this Harbor Freight. Amazon carries it for about $40. But if you don’t want to spend more than $20 for flashlight...then never mind my comment

I know where to buy these at $4. Same flashlight...exactly. Therefore, these must cost Harbor Freight around $2 each. Good flashlight.

This looks like one of those Chinese clone lights all over Amazon.

Crap from harbor freight