Hey @Longfang. I’ve seen the kits you’re looking at, and they’re certainly attractive for the price. The thing is, they are very common, and are generally fairly cheap quality as a result. The 5-bulb softbox is certainly a useful tool to have, but it’s not necessarily the best lighting tool for all situations. These are typically intended for photography applications and are intended to create attractive portrait lighting, but may not be suited for something dark, or dramatic.
It should be noted that these mounts are NOT intended to be used with household light bulbs; instead, these are intended to be used with 150-190W, E27 (Edison Screw) photography bulbs, that come in a colour balance of 3200K (sometimes known as tungsten) or 5500/5600K (known as daylight balanced), which are pretty cheap from eBay or your local photography store. It’s usually a good idea to grab a few of each, as you may want or need to mix up your colour temperatures. Alternatively, you can simply buy some cheap CTO (colour temp orange) gels, and wrap you daylight balanced bulbs in them. I would suggest looking into the concepts of white balance and colour temperature, so you can understand what types of situations your lights would work in.
For film work, 3 softboxes are generally unnecessary. What this will result in is an overlit scene, where there is too much light present. You can achieve a lot of different effects by using your softbox as a key light, but you generally use smaller, or more directional lights to achieve effects such as backlighting, fill, or effect lighting.
As for LEDs… these can be hit or miss. I have a few V-lock panels that produce a lot of light, but the colour quality of light is quite poor, usually producing a green or magenta tinge to my subject. This is an issue present in a lot LED panels, especially cheap ones. When looking for LED panels, you will need to have a look and see if you can identify the CRI rating of the panel. This rating indicates how accurately those bulbs replicate the colour spectrum. Cheap LEDs from your hardware store have a CRI of 60-70; cheap, Chinese panels are generally around 70-80 CRI, while high quality LEDs will be rated at 90+. For video work, you would ideally get something that is 90+ CRI, but these can be expensive. Have a look at a website called CameTV. It’s a Chinese lighting company, that stock 95 CRI LED panels for the cheapest price I have seen, although there is the obvious risk associated with such a purchase. These panels will generally run you around $300 USD. Broadcast quality panels run for a bit more, around $5-600 USD.
My biggest suggestion for lighting is - over time - acquire a mix of different lights. A mainstay of the industry is the tungsten fresnel lighting kit. These will run you in the range of $800-900 USD for a 3 light light kit, generally a 150W, 300W and 650W light. These lights are highly controllable and compatible with equipment like softboxes and gels, allowing you to create the look you want. The downside to these are they get very hot and may not suit enclosed spaces, but the level of control over them makes them invaluable. You can get this style of lighting with an LED bulb, but these can cost you several thousand dollars for a single light.
Other than that, there are a lot of different ways to light your scene on a budget. In a pinch, you can use simple household bulbs in various lamps available at Ikea and create some interesting lighting styles. My biggest suggestion here would be to AVOID AT ALL COSTS fluorescent, LED, or energy saver bulbs as their colour quality is abysmal and their output is insufficient. I have a box of halogen bulbs in different mounts and wattages up to 100W, which makes them incredibly versatile if I need to replace any visible lights in a scene, and are compatible with every common mount you might find in a house. On top of that, halogen bulbs have a colour temperature very similar to Tungsten-balanced bulbs, allowing them to blend seamlessly. These bulbs do get hot however, which can make diffusing or gelling them somewhat difficult.
I know this is a LOT of information, so feel free to ask any questions, and I will do my best to answer.