Probably, Lumintop's switches are one of the most famous flashlights. They already have so many varieties and generations of the same “Tool” model that it’s really very easy to get lost in them. As for today’s model, it is only declared as “improved” version of the previous flashlight, with increased power. Instead of 550 lumens at the maximum, now there is a turbo at 650. How it works and whether it made any sense at all - will be further. Those who are interested are welcome.
Brief characteristics of Lumintop Tool AA 2.0 (2018):
- Model: Tool AA
- LED: Cree XP-L HD
- maximum brightness: 650 lumens (3420cd)
- lighting range: 127 meters
- number of modes: 4
- battery compartment: 14500, AA
- operating voltage: 0.8-4.2V
- waterproof: IP-68
- impact resistance: 1.5m.
- weight: 23gr.
- dimensions: 89.5x18.5mm.
✱✱✱
- Box and delivery set.
Surprisingly, recently the boxes of lumintops are losing their appeal. At least this is the second flashlight that has simplified packaging, not counting the GT mini. And before, I remember, “tula” was often in something gift - right there everything is extremely usual.
But not a single box, as they say. The kit consists of:
Lantern
- lanyard
- spare sealing rings
- diffuser
- documentation, including instructions
Having the original 750mAh Lumintop AA would be very nice, but that's not included in the price - only if you add an extra few dollars. On the one hand, the ability to add it is good, but on the other hand, some tools used to come with 14500 by default. 
Lanyard, in other words - a hand strap, has a plastic carabiner: 
Instructions (on a PC, the photo must be clickable): 
There is also an option in Russian, but there is no particularly interesting information there: 
✱✱✱
- Appearance.
Lumintop Tool 2.0 is absolutely nothing, apart from a slight difference in size, from its predecessor. Since I have both of them on hand, I can speak with confidence.As for the appearance - the lantern is like a lantern, the design does not require any transformations. 
The head of the lumintop has a company logo on it: 
And an LED covered with a smooth SMO reflector and tempered glass with anti-reflective coating. Between the glass and the reflector there is a sealing ring with a luminescent coating. 
The main body is endowed with a small knurling, as well as on other parts of the body, and an already installed clip. 
The tail in my version of the flashlight is the most common, with a button, but without a magnet. On the site you can choose a version of the flashlight with an additional tail, but, again, for an additional fee. More details about this version can be found in my last review "a".
The regular version has lanyard holes: 
The quality of coating and knurling can be seen in the photo below: 
***
Lumintop Tool AA 2.0 disassembles into three parts at once: head, main body and tail. The battery compartment is designed for a 14x50mm battery, that is, 14500 or AA. There is support for Ni-MH elements.
The tail threads are well lubricated, and the O-ring is not forgotten either. 
The inner side of the tail with a spring: 
The inner side of the driver with a pad: 
The complete diffuser is silicone and with the same luminescent coating as the sealing ring near the reflector. Keeps on the head confidently. When installed, the assembly looks like this: 
Additional photos
Not included in the main part of the review: 
✱✱✱
- Dimensions and ease of use.
Naturally, mentioning that I have two versions of the lantern on my hands at once - it would be blasphemy not to show their comparison. However, the following photo can only make you look at the screen:
(observed on the right)That's right, the lanterns are identical, not counting the sizes:
> 89.5x18.5 (Tool AA 2.0)
against
> 90.6x18.5mm (Tool AA).
The second version of the flashlight is shorter by a little more than one millimeter. But, and this is an important "but", above is a comparison of versions without a magnetic tail. With it, both lanterns are even smaller.
As for the ease of use, it is at the level at which you are used to using small flashlights. Holding such a flashlight in your hand is not as pleasant as something on 18650, but here the ability to put it anywhere is valued more than convenience. 
✱✱✱
- Management (modes).
This is where the most important differences from the previous version lie.If in the past there were three brightness modes with 550 lumens at the maximum, then here is the following picture:
- turbo 650 lumens
- high 360
- medium 85
- minimum 16 lumens
(when using one 14500)
The flashlight can be called a key switch, although it is much more convenient to carry it just in your pocket. Nevertheless, the scope of this does not change - to illuminate the road under your feet or a dark room. For such purposes, 650 lumens is more than enough.
Management takes place using the tail button, which is pressed with a very strong characteristic click. Also in the lamp, control is organized by turning the head - in the case of such a small body, this option seemed more convenient to me.
Each "turn" of the head or double-clicking the button switches one mode - and so on cyclically. The memory of the latter is.
In addition to the four brightness modes, there is also a stroboscope, which is turned on by some unknown way: by pressing the button six times (turning the head). I don't know for whom this method can be convenient, especially when each interaction with the flashlight changes its brightness mode. Why it was impossible to use an unoccupied “button hold” is not clear.
I would also like to note the absence of a moonlight. 16 lumens is, of course, not much, but not in comparison with 1-3lm.
Heat.
The Lumintop Tool 2.0 is small, but it has an XP-L HD installed, which we are used to seeing in 18650 flashlights, but not in AA-powered flashlights. No, the use of such a diode in a small case is far from new, but this does not mean that there are no consequences of such a decision.
At the maximum mode, the flashlight heats up and after a few minutes the temperature in the area of \u200b\u200bits head is 45 degrees. This is a lot, considering that there is nothing to keep him for. The situation is somewhat relieved by the fact that this figure is much lower on the street, and that the turbo mode is unlikely to be used on a permanent basis. 
✱✱✱
- Examples of lighting.
The backlight of Tool 2.0 is of medium width, the hotspot is also not the most expressive. But given that the flashlight is neither a headlamp, nor certainly a long-range one, such an option is good for shining under your feet and a little further than that.
As you can see in the photo, the flashlight has two extra halos, among which is greenish - due to the o-ring with lum. spraying. In fact, their influence can be seen only if you look closely.
Beamshots (the wall is not white, you should not judge the shade from the photo). Gif:
Photo comparison: 
Examples at the entrance. As a GIF:
Photo comparison: 
When using a diffuser, the lantern quietly illuminates the stairwell. 
✱✱✱
- Conclusion.
Pros:- high-quality case and assembly
- Diffuser included
- power (reserve)
- two ways to control
Minuses:
- heating
- no moonlight
The pros and cons of Lumintop Tool AA 2.0 (2018) are pretty general. The thing is that there are no big differences from the previous model, apart from increased power. At the same time, for all that, the price of the flashlight remains approximately the same as for previous models, or even more - while it is a novelty - and it only becomes empty in the kit. Although you still shouldn't complain about it, ~$20 for a branded compact flashlight is adequate. Only now, no interesting ideas have been implemented here, there is nothing interesting that could interest a potential buyer - no. They didn’t even make a normal moonlight, and this is in such a miniature case, which implies use in conditions where it may well be indispensable.
Therefore, this lantern is just an updated model of the well-known "tool", nothing more. Undoubtedly, in technological terms, it is somehow more perfect and newer than its predecessor, but this does not apply to flashlights as much as to the rest.
Thank you all for your attention and have a nice day!
10% coupon for a discount in the official store: BWT4414CGRYS(with it the price is $17.09 instead of $18.99). Let's apply under any complete set.
The product was provided for writing a review by the store. The review is published in accordance with clause 18 of the Site Rules.
I plan to buy +5 Add to favorites Liked the review +21 +28Lumen(symbol: lm, lm) - a unit of measurement of luminous flux in SI.
The number of lumens indicates how much light the lamp emits in all directions. The higher the number of lumens, the more light.
One lumen is equal to the luminous flux emitted by a point isotropic source, with a luminous intensity equal to one candela, into a solid angle of one steradian (1 lm = 1 cd × sr). The total luminous flux created by an isotropic source with a luminous intensity of one candela is 4π lumens.
Candela(symbol: cd, cd) is a unit of luminous intensity in SI (from the Latin candela, candle).
The number of candela indicates how much light a lamp emits in one direction, in which it shines most intensely.
One candela is the intensity of light in a given direction from a source of monochromatic radiation with a frequency of 540 * 1012 Hz, (555 nm, green) having an intensity of radiation in this direction equal to 1/683 W in a solid angle equal to one steradian.
Lumens to Candela Converter
The recalculation is carried out according to the formula:
F v =I*2π(1-cos(α)), where
F v - luminous flux
I v - light intensity
α - half brightness angle
To calculate, enter the angle and luminous intensity (luminous flux). Please note that the calculation results depend on the optical parameters of the LED and give an approximate result!
| Candela to Lumen | lumens to candela | |||||
| The power of light, MKD |
half angle brightness |
light stream, mlm |
half angle brightness |
|||
|
|
||||||
| Luminous flux, mlm: | Light intensity, mcd: | |||||
Luminous flux of typical light sources
The comparative parameters of some light sources are given, the values are approximate, only for a comparative assessment.
Radiation power, relationship between light energy (Watts) and luminous flux (lumens)
An important parameter for evaluating the energy efficiency of an LED emitter is the ratio between the radiated power and the power released in the form of heat.
The light emitted by the LED, as you know, has a certain energy and the energy of light depends on the wavelength. However, the intensity of light is not proportional to the energy of light radiation, but depends on the sensitivity of the human eye. In other words, the power of light is the power of light radiation, which is available for perception by the human eye. To convert the radiated energy (Watts) into a luminous flux (lumens), you need to know the wavelength of the radiation and the sensitivity curve of the human eye. It is easy to guess that for monochrome radiation this problem can be easily solved, but for a white LED, it is also necessary to know the spectrum of its radiation and perform a rather complicated integration.
It can be estimated that a 1 W white LED with an efficiency of 100 lm/W emits 0.4 W as light and dissipates 0.6 W as heat, while an incandescent lamp emits only 6 W out of 100 W consumed in the visible region of the spectrum (0 .06 W per 1 W).
The energy consumed by the light source from the mains is not completely converted into radiation. This is especially true for LED lamps. In addition to energy losses in the LED itself, power is lost in the power converter, part of the light is delayed by optics - reflectors, diffusers, lenses. When using an LED with an efficiency of 100 lm / W, the lamp efficiency rarely reaches 80 lm / W, and for the most common products it is 60-70 lm / W. As a result, modern mass-produced lamps are about 10 times more efficient than incandescent lamps.
Understanding the technical features and numerous characteristics can be difficult even for an experienced consumer.
The following questions are common regarding LED lamps:
- What is the analogue of a 100-watt incandescent lamp?
- How is the luminous flux of a lamp determined?
- How many lumens are in a light bulb?
- How to choose an LED analogue to incandescent lamps?
- How many lumens are there in 1 watt of LED light bulb?
Check out the Lumens (Lm) to Watts (W) ratio table for an incandescent lamp in relation to an LED lamp:
How many lumens in 1 watt LED light bulb?
In LEDs, the luminous flux varies depending on the manufacturer, quality and voltage. Average values for 1 W are 80-150 lm. If you increase the voltage of the LED, the luminous flux will also increase, but this also entails an increase in the temperature released. To reduce the temperature, various cooling methods are used using radiators and cooling systems.
What is a lumen?
Lumens measure the luminous flux of a light source.
How to determine the number of lumens in a light bulb?
First, you need to study the product box or product specification for the specified luminous flux. If the information is not listed, you can find a similar product from a well-known manufacturer to compare specifications.
It is also possible to determine how many lumens in your light bulb yourself using a light meter. Lux refers to the ratio of the number of lumens to the illuminated area (1 Lx = 1 Lm / sq.m). You need to know the manufacturer's declared illumination for a particular LED lamp.
In practice, the indicator of illumination on the working surface, measured in lux, is of primary importance. Compliance with the illumination of work surfaces and premises for different areas of activity is determined by state standards prescribed in SNiP 05/23/2010.
How many lumens are LEDs in relation to other light sources?
- LN - incandescent lamp,
- GLN - halogen lamp,
- LL - fluorescent lamp,
- CFL - compact fluorescent lamp,
- MHL - metal halide lamp.
- DRL - arc mercury lamp. High pressure mercury vapor lamps. Used for general lighting of industrial premises and open spaces.
| Lamp type | Power, W | Length, mm | Diameter, mm | Plinth type | Light flow |
|---|---|---|---|---|---|
| DRL 125 | 125 | 178 | 76 | E-27 | ≅ 5500 |
| DRL 250 | 250 | 228 | 91 | E-40 | ≅ 12000 |
| DRL 400 | 400 | 292 | 122 | E-40 | ≅ 20000 |
| DRL 700 | 700 | 357 | 152 | E-40 | ≅ 40000 |
| DRL 1000 | 1000 | 411 | 167 | E-40 | ≅ 55000 |
Light output can be reduced up to 40 percent due to reflection losses, depending on the body of the lamp and the shape of the diffuser when using DRL in lamps.
Ten years ago, choosing the right light bulb was easier, because incandescent bulbs were marked with maximum power. Currently, new LED-lamps are gaining more and more popularity. Finding the right wattage in today's lighting era is more difficult, as LEDs, CFLs, and other energy-saving lamps have completely changed wattage. Now it will not be entirely correct to focus on watts, and it is not always possible. If in a regular store a specialist can still help you choose the right light bulb, then when you make a purchase via the Internet, you are unlikely to find a watt in the description of this light bulb.
What is luminous flux?
Watts refer to the amount of energy consumed. For example, a 100W light bulb uses more energy than a 60W light bulb. This value indicates how much energy will be spent - it does not indicate the amount of light rays that the lamp gives. How much light you get from a light bulb shows 1 lumen.
Lumen is a unit of measurement luminous flux in the system of calculus. The brighter the light bulb, the larger this value will be. For example, a conventional 40 W incandescent lamp has a luminous flux of 300 lumens. Converting lumens to watts is not as easy as it seems.
The packaging of each product must contain information about how much light this product gives. When electrical energy is converted into light rays, some of it is lost and therefore large values are not achieved. It can be seen that this indicator of incandescent lamps is 12 lumens per watt, while fluorescent lamps give 60 lumens per watt. LED lamps provide maximum illumination with minimum energy consumption - up to 90 lumens per watt.
Using this approach, it is not always possible to get the right results, because even bulbs of the same type with the same power can have a different ratio of luminous flux to energy costs, and the difference can be quite significant. Below is a table that allows you to convert watts to lumens for a lamp on first use. With its help, you can easily find out how many lumens are in an incandescent lamp, for example.
It follows from the table that a 600 lm LED lamp is not the equivalent of a 60 W incandescent lamp, and 1,000 lm is not the equivalent of a 100 W incandescent lamp.
Parameters that determine the luminous flux and its calculation
The beam consists of a stream of particles - photons. When these particles enter a person's eyes, certain visual sensations arise. The more photons hit the retina in a certain period of time, the more illuminated the object seems to us. Thus, the lamps emit a luminous flux of photons, which, falling into the eyes, allow us to clearly see objects in front of us.
Unfortunately, the longer the light bulb is used, the less brightness it can give. The lamp itself can also worsen the illumination indicator, because often the losses depend on the quality of the lamp material. The largest losses of luminous flux are observed in gas-discharge sources, for fluorescent lamps these losses can be 20–30%, for incandescent lamps - 10–15%. LED lamps have the highest light output - light loss is less than 5%.
To convert the luminous flux of a lamp to lumens, use the average light output values:
- for diode products, multiply the power by 80–90 lm / W for light bulbs with a frosted bulb and get the light flux;
- for diode filaments (transparent products with yellow stripes) multiply the power consumption by 100 lm/W;
- multiply fluorescent energy-saving lamps by 60 lm / watt;
- for a HPS lamp, this value will be 66 lm / W for 70W; 74 lm/w for 100W, 150W, 250W; 88 lm/w at 400W;
- for an arc mercury lamp, the multiplier will be 58 lm / W;
- a 100 W incandescent lamp produces approximately 1,200 lumens. If the power is reduced to 40 W, the flux will reach 400 lm. But a 60 watt light bulb has an indicator of about 800 lm.
If you need to accurately determine the luminous flux, you will need a luxmeter device. It can be used to calculate , what luminous flux will be at the selected points of the room according to a known method.
One lux corresponds to a certain luminous flux falling on an illuminated surface of one square meter. You can determine the approximate value of the luminous flux created by a particular source using the formula:
F \u003d E x S,
where S is the area of all surfaces of the room you are examining (in square meters), and E is the illumination (in lux).
So if the surface area is 75 sq. meters, and the illumination is 40 lux, the luminous flux is 3,000 lumens. To accurately calculate the luminous flux, many other spatial factors will have to be taken into account.
If you choose the right LED lamp in all respects, subject to all the requirements of the manufacturer, it is guaranteed to last for many years. Currently, the least energy-consuming and most illuminating products are not cheap, but over time they will become available to all consumers.
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