TIPS: If you want only bulb,do not need 20mm pcb,you can choose this :

1.  http://www.ebay.com/itm/Wholesale-High-Power-1W-3W-5W-White-Red-Green-Blue-Light-Beads-LED-Bulb-Chip-/112413722339?ssPageName=STRK:MESE:IT

2 .http://www.ebay.com/itm/High-Power-3W-UV-Ultraviolet-365nm-385-395-400-425nm-LED-Bulb-Chip-20mm-Base-/122504455510?ssPageName=STRK:MESE:IT

What is the full spectrum led chip ?

   It is the newest trend for indoor plants. Advanced LED grow lights chip , not provide sigle color ,provide broad spectrum 400nm~840nm , simialr with sun light ,but most is red and blue ,it is best for plant grow .This is a revolutionary step for LED grow lights which have previously been unable to act as the sole light source for the indoor garden. Suitable for all stages of plant growth and Long Lifetime.

TIPS:
1. Only for Royal Blue (445-455nm)and 660nm red light led bulb and 380-840nm Full Spectrum ,they can be used for Plant Growth Lighting.
2. The 3w bulb can be used as 1W bulb.
3. Brightness，3W>1W,Chip Size:3W>1W
5. View angle：About 120-140 degree,
6. 20mm heat sink PCB(UP TO 1mm thickness),the leds have been sealing-in PCB.

 Specifications:

    1W led:
    Cool White:    DC Forward Voltage:(3.4V~3.6V), Forward Current:  300mA~350mA
    Warm White:   DC Forward Voltage:(3.4V~3.6V), Forward Current:   300mA~350mA
    Natural White:   DC Forward Voltage:(3.4V~3.6V) ,Forward Current: 300mA~350mA
    Red (610-630nm)(660nm):   DC Forward Voltage:2.2V~2.6V,Forward Current: 350mA
    Green (510-530nm):   DC Forward Voltage:3.2V~3.6V ,Forward Current: 350mA
    Blue (460-465nm):   DC Forward Voltage:3.2V~3.6V, Forward Current: 350mA
    Royal Blue (445-455nm):   DC Forward Voltage:3.2V~3.6V ,Forward Current: 350mA 
    380-840nm Full Spectrum:   DC Forward Voltage:3.2V~3.6V ,Forward Current: 350mA 

    3W led:
  
    Cool White:    DC Forward Voltage:(3.2V~3.4V), Forward Current:  600mA~700mA
    Warm White:   DC Forward Voltage:(3.2V~3.4V), Forward Current:   600mA~700mA
    Natural White:   DC Forward Voltage:(3.2V~3.4V), Forward Current: 600mA~700mA
    Red (610-630nm)(660nm):   DC Forward Voltage:2.2V~2.8V, Forward Current: 700mA
    Green (510-530nm):  DC Forward Voltage:3.4V~3.8V, Forward Current: 700mA
    Blue (460-465nm):  DC Forward Voltage:3.6V~3.8V, Forward Current:700mA
    Royal blue (445-455nm):  DC Forward Voltage:3.6V~3.8V ,Forward Current: 700mA
   380-840nm Full Spectrum: DC Forward Voltage:3.2V~3.6V ,Forward Current: 700mA
   Pink:   DC Forward Voltage:(3.2V~3.4V), Forward Current: 600mA~700mA

Package Included:

By your choice