Most parents spend more time reading the back of a cereal box than they do a sunscreen label. The front grabs attention with an SPF number and claims about texture or ingredients. The back is where the useful information lives, if you know what to look for.
In Australia, SPF50+ sunscreens are regulated as therapeutic goods, which means the claims on the label carry a different kind of weight than they would on a cosmetic product. This post decodes five elements worth reading on any Australian sunscreen label: what each one means, what it was tested against, and what it does not tell you.
Australian sunscreen labels are regulated, and that changes everything
In Australia, a sunscreen sold as SPF50+ is classified as a therapeutic good, regulated by the Therapeutic Goods Administration (TGA) and tested to the Australian and international standard, AS/NZS 2604:2012. It is not a cosmetic product.
That classification changes the status of the claims on the front of the pack. An SPF number or a broad spectrum statement on an Australian-registered sunscreen is a tested claim, confirmed under regulated laboratory conditions before the product can be sold. It is not the manufacturer's own estimate.
This is why the phrase "Australian made to strict TGA sunscreen standards" means something specific rather than something aspirational. The standard covers how the product is manufactured and tested. The label claims follow from that, independently of what the brand chooses to say about them.
Five label elements, decoded in plain language.
SPF 50+: what the number really tells you
SPF stands for Sun Protection Factor. It measures the ratio of UV exposure needed to cause sunburn with the sunscreen applied compared to without it, under standardised laboratory testing.
The plus sign after SPF 50 carries its own meaning. To label a sunscreen SPF 50+ in Australia, the product must achieve a tested mean result of at least SPF 60. It is a higher threshold, not a rounded-up version of SPF 50.
Our own mean result, independently tested by Eurofins Dermatest to ISO 24444 and AS/NZS 2604:2012, is 61.0, with a 95% confidence interval of 57.8 to 64.1. The full certificate of testing is published at lullabyskincare.com/pages/spf-testing.
Two things SPF does not tell you. First, it is not a number of minutes. SPF is a ratio of exposure, measured under controlled conditions, not a countdown clock for time spent outdoors. Second, a higher SPF number does not extend the interval between applications. Reapply every 2 hours and after swimming or towelling, regardless of whether the label reads SPF 30 or SPF 50+.
Broad spectrum: the other half of the protection
UV radiation reaches skin as two wavelengths. UVB is the burning wavelength; it causes redness and is the wavelength measured in SPF testing.
UVA penetrates deeper into the skin. It does not cause immediate redness, which makes it easy to overlook. It contributes to premature skin ageing and is present on every sun-exposed day, including overcast days and winter days when UVB levels are lower.
"Broad spectrum" on an Australian sunscreen label means UVA protection has been tested to the standard and confirmed. It is a regulated claim with a tested basis, not a marketing addition.
SPF50+ broad spectrum sunscreen can aid in the prevention of premature skin ageing. That is a permitted indication under Australian sunscreen standards, stated here once, as a fact.
Lullaby's claim as it appears on the label: SPF50+ broad spectrum UVA and UVB protection.
Water resistant up to 4 hours: what it does and doesn't mean
"Water resistant up to 4 hours" on an Australian sunscreen label is a tested claim with a stated duration. It means the product has been tested to maintain a meaningful level of SPF protection after a specified duration of water immersion, under standardised conditions set out in the testing standard.
What it does not mean is that a single application lasts for four hours in or out of the water.
The reapplication instruction exists independently of water resistance: every 2 hours and after swimming or towelling. Both parts of that instruction matter. Towelling removes sunscreen mechanically, regardless of how water-resistant the formula is. A four-hour water resistance rating describes reliability during water activity, not freedom from the reapplication schedule.
The practical reading: water resistance makes sunscreen more reliable during a swim. It does not make the interval between applications longer. Reapplication timing stays the same.
The AUST L number: the small print that matters most
Every sunscreen legally sold as SPF 50+ in Australia carries an AUST L number. This is the product's listing number on the Australian Register of Therapeutic Goods (ARTG), the TGA's public record of registered and listed therapeutic goods.
The number appears on the label, usually in small print on the back panel. It typically reads "AUST L" followed by a six-digit number.
Ours is AUST L 391791.
The TGA maintains a public search tool for the ARTG at tga.gov.au, where anyone can look up any listed product by name or AUST L number and see the registered indications, ingredients, and sponsor details. We publish our AUST L number because the listing is public, and because information that can be verified is more useful than reassurance that cannot.
A note on terminology: an AUST L listing is a regulatory listing, confirming that the product has been assessed and accepted under the therapeutic goods framework. It is not a quality endorsement, and describing any product as "TGA approved" is not the correct regulatory language. It is also not language we use.
What the front of the pack won't tell you
The regulated claims, SPF, broad spectrum, water resistance, and AUST L number, carry tested, defined meanings. Other language on the front of a pack may not.
Texture and feel words, including lightweight, silky, fast-absorbing, and zero white cast, are the brand's own description of the product experience. They are not regulated in the same way. A useful approach is to read them alongside the ingredient list and independent reviews, rather than in isolation.
"Free from" claims are worth reading carefully. Specificity is what makes them checkable. A list that names particular ingredients is a concrete claim. Ours reads: free from oxybenzone, parabens, phthalates, sulphates, petroleum, triclosan, BPA, and essential oils. Language like "free from harsh chemicals" or "free from nasties" carries little meaning, because it can be applied to almost anything.
The practical details near the bottom of the pack are worth reading too: directions for use, storage guidance (below 30°C; heat affects SPF performance over time), and the expiry date.
The 30-second label check
On any Australian SPF 50+ sunscreen, five things to look for:
- SPF50+ (the plus means a tested mean result of at least SPF60)
- Broad spectrum (UVA and UVB protection, both tested to standard)
- Water resistance stated with a specific duration
- An AUST L number (the TGA listing, publicly searchable)
- A "free from" list that names specific ingredients, not categories
Label literacy is not about suspicion. It is about knowing what the regulated claims mean and being able to read any sunscreen pack with confidence. The claims on Lullaby's label are the same ones discussed here, and the results behind them are published and verifiable.
Full testing results are at lullabyskincare.com/pages/spf-testing. For guidance on choosing a daily sunscreen for sensitive and reactive skin, see our sensitive skin sunscreen guide.
Our SPF50+ Sensitive Skin Sunscreen 140g is designed to be worn every day of the year. Designed for sensitive, reactive, and eczema-prone skin. Zero white cast. Infused with Aloe Vera and Vitamin E. Gentle enough for babies, made for the whole family.
