How do you determine how many black lights are needed for a party, is a question that often gets asked and can be difficult to answer. This is because there are many factors that will affect the result, such as, how big is the party space, how many people will be attending, which black lights are you planning to use, and where will the blacklights be positioned.
Going back a few decades there were only two real choices when it came to black lights. You could buy a black light bulb or a black light tube. These days there are far more (and much better) options, including UV canons, black light bars, LED black light torches and LED black light strips.
Lets quickly talk through each of the factors listed above before finally giving recommendations for how many lights you need.
How big is the black light party space?
The larger the party area the more lights you will need to ensure that black light rays reach all parts of the room. If you plan to have a party in a small bedroom you may find that one light is plenty, if your party is in a gym though you will need a lot more lights to reach all the corners of the gymnasium.
How many people will be attending your black light party and where will you position the lights?
The more people that are attending your party, the more chance there is that people will block the rays of UV light coming out of your black light and create shadows. Lets say you decide to go with a single black light bar, black light canon or black light tube. If you place the item on the floor pointing up at the party or attach it to the wall pointing outwards, the light may light up the entire room. Once you add a lot of people to the room however the people will get in the way of the light rays shining from the one direction and create shadows on the other side of the room. You may therefore need more than one light shining from each direction. Hanging lights from the ceiling is a good idea but it will not light up people's faces and clothes the same way that a light shining directly at people from the walls would.
Which black lights to use for your party?
As mentioned there is a world of choice now when it comes to black light products and some of them will shine a lot brighter than other. I will give you a quick break down below. Please keep in mind that, while watt measurements are familiar to consumers and have been featured on the front of light bulb packages for decades, watts are a measurement of energy use, not brightness. Since the introduction of LEDs which are far more energy efficient, Lumens have become the most popular and accurate scale for determining the brightness of a light.
Black light Incandescent bulbs
These were one of the original types of black light. As with all technologies the early ones tend to become outdated and replaced by much better and efficient versions. These light bulbs are probably the worst choice when it comes to a black light party and you will need many, many bulbs to light up a decent sized party space.
In the black tent below 30 black light fluorescent bulbs were used to light up an area 10m x 6m. The area looked equally as good with one Glowave™ black light glow party kit.