The ideal UV index for tanning is generally considered to be between 3 and 5. This range is moderate and strong enough to stimulate melanin production in the skin, which leads to tanning, while minimizing the risk of severe skin damage such as sunburn

. Key points about tanning and UV index:

• UV index 3-5 is optimal for tanning safely, allowing the skin to tan without excessive UV damage. However, even at this level, prolonged exposure without protection can cause sunburn, so sunscreen and protective measures are recommended

• UV index levels above 5 increase the risk of skin damage and sunburn. For example, UV index 6-7 is high and can cause quicker damage, while 8-10 is very high and 11+ is extreme, making tanning unsafe at these levels

• The best times to tan are usually in the morning or later afternoon when the UV index is moderate, avoiding peak sun hours (10 a.m. to 4 p.m.) when UV radiation is strongest

• Protective measures such as applying SPF 30+ sunscreen, wearing hats and sunglasses, and limiting exposure time are important even at moderate UV levels to reduce skin damage risk

In summary, a UV index of 3 to 5 is considered good for tanning because it balances effective melanin stimulation with a lower risk of sunburn and long- term skin damage. Always use sun protection and avoid excessive exposure even within this range to maintain skin health