Please take a look at this Youtube DIY Video that teach you how to use thisstep-down moduleto DIY Building a TRUE 4k home cinema projector (it’s awesome)

it's very useful and funny if you DIY by yourself.(Video from Web Celebrity “DIY Perks” at Youtube website)

DIY 4K Home Cinema Projector:https://www.youtube.com/watch?v=YfvTjQ9MCwY

The cost performance of our this COB LED is better than YUJI COB LED. YUJI COB is too expensive

Remember install big radiator on this COB LED for cooling heat dissipation

Specifications:

1: High CRI Ra 95+,

2: Emitting color: Double color,

200W+200W: warm white 2600K-2800K + daylight white 5400K -5800K

300W+300W: warm white 2900K-3150K + daylight white 6000K -6500K

3: Brand of LED Chip: Maded IN CHINA

4: Working voltage: 200W+200W: DC72-75V, 300W+300W: DC74-77V.

5: Rated Current: 200W+200W: cw+/cw-:2800mA, ww+/ww-:2800mA. 300W+300W: cw+/cw-:4000mA, ww+/ww-:4000mA.

6: Power: Watt: cw+/cw-:200w, ww+/ww-:200w. or cw+/cw-:300w, ww+/ww-:300w.

7: View Angle:120°

8: Lumen: 80-110lm/W,

200W+200W: warm white, 15000lm-16000lm, daylight white, 18500lm-19500lm

300W+300W: warm white, 24000lm-25000lm, daylight white, 29500lm-30500lm

9: Application : indoor and outdoor lighting LED Floodlight, DIY LED photoflood lamp, DIY Camera Fill Light, DIY LED Film and television light, advertisement lamp, and other DIY Lights you can creat.

The main advantage of our COB LED:

1. We support to Customized LED COB with high cri & different color temperature 2200K, 2700K, 3000K, 3500K, 4000K, 4500K, 5000K, 5500K, 6000K,etc

2. High thermal conductivity, low light decay, long life,.

3. The light evenly, no stains, no ghost. Single high power LED light source is mostly use lens to improve photosynthetic efficiency, increase cost and make the light Angle decreases; And use the lamps and lanterns of led lamp bead will appear out of the light.