If you’re looking for a deep, rich, sunless tan without spending time in the sun (and risking UV damage), this lotion is a strong contender. The brand behind it, Sun Labs (also referred to as Sun Laboratories by Giesee), has been producing sunless tanner lotion products for decades.

The “Ultra Dark” version is positioned specifically for those wanting very deep bronze tones, and is often listed for “medium to dark skin tones.”

What does it claim to deliver?

According to product descriptions:

·         A “deep, natural-looking tan without the harmful effects of UV rays.”

·         Enriched with hydrating ingredients and “instant tint” bronzer guide so you can see application.

·         Designed to be streak-free and easier to apply than older self-tanners.

·         Available in various sizes (4 oz, 8 oz, 32 oz) and bundle options (with mitt, etc) to suit needs.

Who is it for?

·         If your natural skin tone is medium to dark and you want to deepen your glow rather than just add a subtle hint, this is aimed at you (since it’s “Ultra Dark”).

·         It also can work for lighter skin tones if you’re going for a dramatic bronze rather than a light sunkissed look — but you should be aware the result will be much darker than a mild tanner.

·         Ideal when you want a tan year-round, or for an event, but don’t want to rely on sun exposure or tanning beds.

·         Note: as with all self-tanners, skin preparation and correct application matter a lot. For best results you should have even skin tone, smooth texture, and exfoliated surface.

How to use it (and get the best results)

Here are some application tips gleaned from standard self-tanning best practices + product specifics:

1.      Exfoliate & moisturize before you apply. Focus especially on elbows, knees, ankles, wrists (dry areas absorb more tanner and can turn darker than the rest).

2.      Use a tanning mitt if possible — many bundles include one. This helps avoid uneven application, finger stains, and streaks.

3.      Apply evenly and promptly. Because this product builds a rich tone, you’ll want to make sure you cover evenly.

4.      Pay attention to tricky areas — again: knees, ankles, wrists, outer feet tend to absorb more. You may apply a lighter coat there or a plain moisturizer first.

5.      Allow development time. The tinted guide-color (if present) helps you see the application, but the underlying bronzing reaction (with DHA or equivalent) will develop over hours. Some reviews say let it sit a few hours (or overnight) before showering.

6.      Maintain your tan. Moisturize daily, avoid harsh soaps or long hot showers, and periodically apply a refresh coat if the tan fades unevenly.

7.      Patch test, especially if you have sensitive skin or specific skin concerns. Even though the brand emphasizes hydration and nourishing ingredients, any self-tanning product can cause reactions.

Pros & things to consider

Pros:

·         Enables a deep bronze tone without UV damage.

·         The brand has a long history, multiple size options, and appears to cater to serious sunless tanner lotion.

·         Hydrating formula claims make it a bit more skin-care friendly than some older self-tanners.

·         Versatile in that you can choose size, bundle (mitt included), and adjust for the intensity you want.

Considerations:

·         Because it’s “Ultra Dark,” there is a risk of too much color, or an unnatural tone if your skin's undertone doesn’t match or application is uneven self suntan lotion.

·         The price may be higher than some “entry-level” self-tanners (given the brand, size options). You’ll want to consider cost versus how often you’ll use.

·         As always with self-tanners: if you skip exfoliation, moisturization, or proper application, you may end up with streaks, uneven fading or patchiness.

·         It is not a sunscreen — if you’re going outside you still need SPF. “Tanning” via self-tanner doesn’t protect you from UV. (Important: Tanner ≠ sun protection.)

Final thoughts

If you’re committed to achieving a rich, deep bronze glow without risking sun damage, the Sun Labs Ultra Dark Self-Tanning Lotion is an attractive option. It combines the capability for strong color with skin-friendly features (hydration, antioxidant claims). The key is to use it with care: prepare your skin, apply evenly with a mitt, choose the right depth of color for your skin tone, and maintain the glow with regular moisturizing.