Take note that indoor tanning lotions don't provide protection from the sun.
The tingle sensations when you apply indoor tanning lotion are actually the effects of increased blood flow at the skin level. The ingredient that promotes such blood flow actually tingles with other effects as well. Chemicals and irritants also make up for the tinglish feeling or the reddening and flushing of the user's skin. People have different reactions for such ingredients; your indoor tanning lotion may have some minor tingle effects on you but may proof to be a pain for another. That is why there is no standardization for such tingling effects, and some companies produce separate lotions such as “accelerator” (tan enhancements) for their customers to choose whether or not they want to use it separately.
Bronzer is also another ingredient in the indoor tanning lotion, usually DHA which is used to help tanning. Bronzer's reacts to help us in our tanning to give us immediate color without avoiding ultraviolet exposure. This is used like a car choke to jump start the process of the initial tanning process. Common indoor tanning lotions contain melanin, L-Tyrosine, tea oil, copper, and other natural oils varying from one brand to the other.
As much as we like perfume, fragrance runs as the most critical element in which people tend to select their preferred brand. Indoor tanning lotions are used indoors, making the aroma more pronounced and promoting “fragrance” as a vital factor for the consumers. Hempseed oil is another crucial moisturizing element in indoor tanning lotions as moisturizing is the last and most important step when doing indoor tanning, as water brings life and rejuvenation for the skin.
Last but not least is that it is advisable to use indoor tanning lotions away from the sun. Indoor tanning lotion offers 0% protection from the sun. It is still up to the individual user as using it under the sun might provoke overexposure and unwanted side-effects compared to a regulated environment of a tanning bed.