If you are using products with authentic certificates regulated by appropriate laws, then the danger intensity is close to none. The common safety measures like keeping it away from eyes and following the steps religiously still count as necessary. Otherwise, you may get fatal injuries. If you are under the light and find it uncomfortable, you should consult an expert and seek the necessary help. It isn’t a sign of excessive danger but a precautionary step for future interactions with the product. The range, power, closeness to the skin – all characteristics play an important role.