The keyword most likely refers to Godox’s 400Ws and 600Ws class battery-powered strobes, such as the AD400Pro and the AD600 family. The 600 class offers more maximum output and bigger reach in bright light, while the 400 class is smaller, lighter and easier to carry. Confirm exact models and specs on the maker’s page.
What These Flashes Are
Both classes are portable monolights with a rechargeable battery, a bare-bulb style head, a modeling lamp and built-in Godox X wireless control. They are made for location portraits, events, weddings and studio work away from mains power. Each uses a modifier mount, so softboxes, umbrellas and reflectors can be shared across your kit.
Main Differences
| Trait | 400 class | 600 class |
|---|---|---|
| Maximum power | Lower | Higher |
| Size and weight | Smaller, easier to carry | Larger, heavier |
| Best use | Portraits, small groups, travel | Groups, bright daylight, big modifiers |
| Battery life | Depends on power used | Depends on power used |
What Power Does for You
- Overpowering sun: more power lets you use a smaller aperture or faster shutter in bright light.
- Large modifiers: big softboxes and octagons soak up light, so extra output keeps the aperture reasonable.
- Recycle and battery life: running a flash at lower power usually means quicker recycling and more flashes per charge.
- Headroom: a stronger unit can work at a lower setting for the same result, which can be gentler on battery and flash duration.
How to Choose
- Decide on your typical modifier. Small to mid-size softboxes work fine with a 400 class unit. Large modifiers and groups benefit from the 600 class.
- Consider travel. If you carry stands, a bag and a modifier, saving weight matters.
- Think about shooting conditions. Outdoors in full sun, extra power is useful.
- Check the accessories you already own, such as triggers, mounts and reflectors, to see what shares across models.
- Consider buying two lights of the smaller class rather than one large one if you want multi-light setups.
Before buying, also look at how each unit handles heat during rapid bursts, whether the head accepts the modifier mount you already own, and how the battery is charged and carried. Practical details like these often matter more at a busy shoot than the headline power figure.
FAQ
Is a 600Ws flash twice as bright as a 400Ws flash?
Not in a simple way. Light output is measured on a logarithmic scale, so a 600 versus a 400 is a bit over half a stop of difference on paper. Real results depend on the reflector and the model.
Can I mix 400 and 600 units in one setup?
Yes, if they share the same wireless system, you can control them from one trigger. Check compatibility with the specific models.
The Short Version
Choose the 400 class for lighter portrait and travel kits, and choose the 600 class for more power with large modifiers, groups and bright outdoor work. Confirm model details on the maker’s page, as the line-up changes.
