Comments about Princeton Tec Princeton Tec, Impact XL:

I will use this light for poking about during daylight use and as a back-up during twilight/night dives. It seems to have a concentration of light but not @ a point. With the LEDs the batteries should last a long time along with the brightness of the light. It is possible to have the lens assembly which is used for the on/off switch tightened just a bit too much which allows the light to come on under pressure from dive depths. Also, if the lens assembly is backed off too much the unit will flood. The operation is something that the operator has to get used to.

Comments about Princeton Tec Princeton Tec, Impact XL:

This is a good solid light that will stay on for a long time. I use it as a backup. Be careful to not unscrew the lense (on-off switch)too much when under water or prior to entering, because if you go past the 0-rings it will flood.

Comments about Princeton Tec Princeton Tec, Impact XL:

This is a decent light as a backup, though not super-bright. When used during the day, it has to be carefully directed to be used as a "peeker" for under ledges, etc., or it won't be effective, as it isn't that bright around the periphery.

It would be much easier to use if it had an actual on/off switch. Instead, you turn the body of the light, as if you are tightening or loosening it (as you do when you open it or put in the batteries). This creates a real danger of opening and flooding the light when you are simply trying to turn it off. Not sure why it was designed this way.

We bought two, and one flooded the first time it was used, even though it had never been turned on or off.

Comments about Princeton Tec Princeton Tec, Impact XL:

We use the light for night diving. (it's not so great on walls/crevasses for daytime diving though) It is bright white in color (cooler white versus warm white) and as intense as most dive lights that other divers use (a bit more compact in the width of the light diameter, but I like to look for small stuff and not search the entire ocean at night anyway). twist on-off sometimes sticks if too tightly closed and not so easy with gloves. we've had 3 so far. after perhaps 100-150 dives, they do seem to flood, but for the price, we don't complain. batteries last forever and we generally use rechargeable ones. lightweight. great value.

Comments about Princeton Tec Princeton Tec, Impact XL:

This is a reliable backup divelight with a strong, white and bright beam (and it lasts for >2 hours on new 4AA Alkaline batteries). It is sometimes good enough as a primary (if you dive in clear water). I attach it to a retractor clipped on my BCD. The only downside is the on-off is done by turning the head - if you leave the head too tight, it comes on when you enter the water (you might not notice this in the day or when you have the light in a pouch). If you keep it too loose, you risk flooding the light. There doesn't seem to be a product out there that can best this light - other competing LED divelights in this price range have similar mode of operation and some with on-off switches (which cost double) have trouble with the switch mechanism. The LED doesn't seem to flicker on my light.

Comments about Princeton Tec Princeton Tec, Impact XL:

Super bright light, bought as a backup, but I use it as my primary attached to my wreck reel

Comments about Princeton Tec Princeton Tec, Impact XL:

This is a great little light! It is small enough to just clip to your BC but it is plenty bright. It fits well in my hands with 5mil gloves on and is easy to turn on and off. I mostly use it to look between rocks and tight cracks ect fo bugs... Batterys last a long time too!! Good all around or backup light.

Comments about Princeton Tec Princeton Tec, Impact XL:

Not a bad flashlight for outside the water or as a temporary backup, however its not very bright (in low vis water) and the on/off is goofy as you have to screw the light hood in to turn on, and back it off to turn off (like youre removing the batteries). Also seems like it takes alot more turns to turn off, which I personally felt like water would pour in

Comments about Princeton Tec Princeton Tec, Impact XL:

This light gives a nice bright WHITE light. I used it on a night dive in Cozumel and it worked just great. Easy to hold onto and doesn't get in your way.

Comments about Princeton Tec Princeton Tec, Impact XL:

Great light as a back up for night diving or keep in BC pocket for use during the day, looking in crevasses

Comments about Princeton Tec Princeton Tec, Impact XL:

I've gone through about a dozen "back-up" lights looking for the right one at a low price: dependable LED, long battery life, solid build. They all fell apart after a few dives, except this one. I finally opted for two primaries, but recently decided to give this one a try. I have really tried to punish this thing, and it keeps on working. I lost it on a 125 foot wreck dive, but found it the next day still lit-up! Only complaint is the lens has scratched earlier than expected.

Comments about Princeton Tec Princeton Tec, Impact XL:

Great light for looking into spaces, etc. I was in a wreck recently with someone who had a larger light. This one had a much better beam. After the dive the guy who was carrying the bigger light commented on how much better my light was. My only wish is that it had a button versus the 'twist on' feature.

Comments about Princeton Tec Princeton Tec, Impact XL:

Taken it on 20ish dives and has been very useful as a backup torch.

I have been careful to maintain it, but unfortunately I picked it up the other day and the glue holding the lens cap together came apart so I had to throw it out.

Comments about Princeton Tec Princeton Tec, Impact XL:

I originally bought this as a backup for my cave course, and it performed very well when I ended up having to use it to exit a cave on one dive. It's very bright and the beam travels a long distance. I recently used it for night diving in the tropics, and it was all I needed; in fact it may have been a little TOO bright. Excellent for packing because it's small and light. Great battery life and nice that it uses 4 AAs. I'm buying a second one very soon.

Comments about Princeton Tec Princeton Tec, Impact XL:

I carry this light on every dive. It's good for lighting up dark crevices during the day and also as a backup for your night dives. Note that it will often illuminate by itself as you descend due to the increased pressure, but the extremely long battery life makes it low maintenance.

Comments about Princeton Tec Princeton Tec, Impact XL:

This is an excellent light to use as a backup. The batteries that you place in it will last a LONG time, because it has an LED bulb. The rubberized grip is nice and the beam is fairly solid. It is not powerful enough to be much use during the day, even in a fairly dark cave or under-ledge, but it's not meant for that - that's what a larger, bulkier primary is for. As an auxiliary light it's perfect.

Comments about Princeton Tec Princeton Tec, Impact XL:

This is a great light for the price. I carry two.

Comments about Princeton Tec Princeton Tec, Impact XL:

Not a bad little backup light. Definitly not bright enough as to use as a primary, but I doubt that is its intended usage. It has a bright beam for the size and will get you up from depth with no problem should your primary die.
As someone else mentioned, not the best for daytime use.

Comments about Princeton Tec Princeton Tec, Impact XL:

Good back up light, especially for the price. It's nice and compact and very druable.

Comments about Princeton Tec Princeton Tec, Impact XL:

I used two of these lights during IDC. I was always using my torches and found that they were very reliable and did not drain the batteries like other torches. I was pleasantly surprised after dropping one light almost 5 meters and it still worked like the day I took it out of the box.

Comments about Princeton Tec Princeton Tec, Impact XL:

As a backup light in clear water, I doubt I'll see a light that rivals the usefullness of this light (for under $100 ...I don't think it'd be fair to compare this to one of the $300+ ultra-compact HID lights.)

On a daytime dive, it doesn't have a bright enough "hot spot" to be very useful looking under ledges.